furnace blowing cold air sometimes
But first, we’ll share a couple of fixes you can try at home before you call a pro. This is what leads to the emission of cold air. If the thermostat isn’t responsive, call a professional. Alternatively, you can call your local utility company or an HVAC technician to make sure it is lit safely. These become clogged sometimes, so you need to ensure that you are changing them regularly. If your furnace seems to be blowing cold air, it could be a problem with the ignition system. Click here for a guide on how to fix this problem. Cold air trapped inside will need to be expelled before the hot air can take its place! If your gas furnace only blows cold air periodically, your HVAC system fan settings may be the problem. Don’t freeze on days and nights you should be warm and cozy. When air blows over the coils, the air picks up that heat. I've done the same thing at the breaker, but the thermostat is usually closer at hand. Dirty Furnace Filter. In such cases, a safety control device known as the limit switch will shut off the burners. By Switching your settings to “auto” it changes a few things. Your furnace’s fan is controlled by a limit switch which tells it when to turn on and off. Check the Pilot Light. Some reasons your furnace is blowing cold air: 1. If you’re not comfortable with that or run into problems, call a Phoenix furnace repair company. A clogged filter means that airflow will be blocked over the heat exchanger. Before calling a repair service, assess these things. I have a York Diamond 90 furnace up in my crawl space. Inadequate gas supply. Restricted airflow can overheat your furnace, causing a safety control to shut off the burners. Without combustion, you won’t have heat. So your fan will only run when your furnace system is running. I did some googling and asking around, and folks told me my flame sensor was likely bad. I did some googling and asking around, and folks told me my flame sensor was likely bad. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. Pilot Light Issues Sometimes, the heat exchanger can get too hot and overheat. Viewed 3k times 0. Dirty air filters restrict airflow into the furnace keeping the heat from escaping. Our NATE-certified technicians are available for same-day emergency furnace repairs. We have been servicing Calgary & surronding areas for over a decade With Top-Rated, award winning service. Troubleshooting a Furnace That's Blowing Cool Air. Why is my new high efficiency furnace blowing cold air sometimes? Why is my new high efficiency furnace blowing cold air sometimes? Privacy Policy. Proudly serving the Calgary, Chestermere, Airdrie and Cochrane areas. If they’re not, try changing the batteries. During that time, the gas valves might have closed, broken, or clogged. Here are 7 possible causes, and only some cost money to fix Ph: 425.402.4456 If your furnace is blowing cold air, give us a call today! We're sorry, but it looks like we don't offer service to this zip code. A professional can check the limit switch to make sure it’s working correctly. So, how do you know which problem is causing your furnace to blow cool air? One of the most common causes of a furnace blowing cold air is not actually a repair at all. A friend of ours bought a new house recently. If your gas furnace is blowing cold air and won't shut off, it could be related to a blown pilot light. It creates a spark, which lights the burners which saves the pilot light from being on at all times. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Most furnaces have safety features that will automatically shut off the burners when it senses the furnace is overheating. What Is the Average Cost of Duct Cleaning? It is important to clean both the oil and air filters frequently. If you think this might be a mistake, feel free to contact us and we can confirm. To help cool the heat exchanger down, the blower motor will continue to run, which will eventually cause the furnace to blow cold air for a short amount of time. If your gas furnace is older and it’s blowing cold air, chances are its pilot light has gone out. It restricts the airflow in and out of your furnace, which can cause this issue. Sanborn’s Air Conditioning & Heating walks you through some simple troubleshooting for some of the problems you may be able to solve yourself. It could be that your furnace blows warm air sometimes and cold air most of the time. It's also possible that the furnace's pilot light isn't well shielded. It’s not uncommon for homeowners to forget about their furnace filters. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. So Why Is My Furnace Blowing Cold Air Instead Of Heat? Sometimes the light just blows out, but it could also be a sign of another problem. A dirty air filter will restrict airflow to your furnace and can cause it to overheat. Closed or clogged valves cannot supply the gas well, and this translates to cold air. Sometimes the light just blows out, but it could also be a sign of another problem. My brother's furnace started blowing cold air one on of the coldest days of the winter. If you have a dirty filter, replacing the filter typically stops cold air from blowing. When your furnace isn’t running, the air in your ducts cools down. Your furnace may be blowing cold air … Your Furnace Fan will be running all the time even when the furnace system is off. 5740 General Washington Dr +2 votes. This is due to the programmed settings of a furnace system, which gauge the temperature within a living quarter and only disperse heat until the preset temperature is reached. Sadly, this cannot be solved on its own. Tags: Calgary, Chestermere, Airdrie, Cochrane, © 2018 JPS Furnace & Air Conditioning, SiteMap. If you have leaks or holes in your air ducts, warm air can easily escape which could explain why you’re feeling cool air coming from your furnace instead of heat. There could be a few reasons why your furnace is chilling the room. Related: Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? I have a York Diamond 90 furnace up in my crawl space. As filters become more clogged a few things happen. Repairs such as a new heating element or pilot light are often needed to return your furnace to normal operation. An electric ignitor doesn’t require a pilot light and would act very similar to a gas stove top. Or the furnace always blows cold air. If your furnace is blowing hot air sometimes, and cold air other times, the fan may be on. 7. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. Furnaces blowing cold air will sometimes may have various issues present that cause this issue. If it does overheat, the safety control will shut off the burners, causing the fan to blow cool air through the house versus heated air. If you are in need of a furnace repair you can trust our furnace experts here at JPS Furnace & Air Conditioning. Sometimes, a furnace blows cold air due to duct leaks. The dirty air filter will block airflow, causing the furnace to run longer to heat your home until it overheats. I took the liberty of opening the panel on the furnace and turning it off and back on again to see if that would help -- no luck. Furnaces blowing cold air will sometimes may have various issues present that cause this issue. Hans Heating & Air offers service 24/7/365 – we help you regardless of the time of day. This causes your furnace to kick in and start heating up while the fan circulates the air. If your furnace starts to run properly after the filter is changed, you’ve solved the problem. If you have a fan trimer, that house air circulation blower may come on in seconds after the furnace starts up, even if no fire comes on. Double-check that your thermostat is set to HEAT and not COOL. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. 11 – No Fuel for Furnace How Often Should I Change My Furnace Filter? Why Is My Furnace Blowing Cold Air Sometimes? 7. Funny as it may sound, a system set to “on” will not necessarily blow warm air. That outside air in the mix lowers the temperature of the air that’s just come from your furnace. (2020). The Thermostat Fan Is Turned Incorrectly. If your furnace keeps blowing cold air, you may notice that your air filter is too dirty. Check Furnace Air Filter. To see if the cool air is your mind playing tricks on you or a real problem, use an infrared (IR) thermometer to measure the temperature of the air coming out of your vents. If you’re noticing that your furnace starts blowing cold air here and there, not consistently, it may be because your thermostat is set to ON. When it’s cold outside, the last thing you want to find is cold air coming out of your furnace when it’s supposed to be heating your home. There are four main components of a furnace. The pilot light is a small gas-flame inside the furnace that ignites the fuel. The “on” option is exactly how it sounds. Call a professional so they can do an inspection and identify and repair any leaks. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack. This turns off the burners to prevent a fire in your home. Furnaces can overheat for a variety of reasons, including: If you notice your furnace only blows cold air on occasion but your home is still maintaining its temperature than this may be simply a setting on your thermostat. Check the pilot light. Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. If it’s out, that’s why your furnace is blowing cold air. Warming Up. These older furnaces typically have what is called a pilot light. Why Is My Furnace Blowing Cold Air Sometimes? Active 2 years, 7 months ago. Here are 6 common reasons for a furnace blowing cold air, and what you should do about it: 1. There’s only one thing worse than a furnace not working, it’s a furnace blowing cold air. Fortunately, they are pretty inexpensive and easy to change. 7 Possible Reasons Your Home Heater/Furnace Is Blowing Cold Air. My furnace is … I ordered one online and installed it (simple), but the problem still persists. The house stays at a constant 72 degrees (what it's set at), but I'm afraid that the unit may be in need of repair or replacement, or that it might be using more energy than necessary. Your furnace may be blowing cold air because the filter is too dirty. Your System Was Just Turned On. When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. Not realizing your high limit switch is dead (or even that such a part exists), you’ll be scratching your head on this one. If the valve is stuck closed, that may also answer the question, is your Toyota car heater blowing cold air. When the furnace overheats, a safety device can turn the furnace burners off and the blowers will keep blowing cold air to cool the furnace down to a secure level. Some simple HVAC system issues easy to troubleshoot include: Gas furnace fan settings. Most professionals recommend changing a filter every 1-2 months. Maybe, you were not using the unit during the summer. Clogged filter causes safety control shut off. Eventually this causes your furnace to kick in a safety feature called a limiter switch. If it’s not, they can replace it. This is a good thing. Well this happens sometimes and a few things can be the cause. 1. You should contact an HVAC expert that will help you find the solution. If your blower though comes on by sensing heat, it might take up to about 1 1/2 minutes to come on AFTER the burner fire comes on. Especially if your furnace is blowing cold air. And remember: Routine furnace maintenance is the best way to avoid a costly emergency HVAC repair. Check to make sure your gas supply is turned in the on position (parallel/in line with the gas supply pipe. 11. Change the air filter. Unfortunately, this is not a problem you can fix on your own. The blower keeps blowing to cool the furnace down to a safe level. Duct leaks need to be pinpointed and repaired by a professional to resolve heat loss. Should My Thermostat Be Set To “on” or “auto”? Damaged heating elements of electric furnaces also cause your furnace to blow cold air. If you know how, carefully try re-lighting the pilot. The longer you run a broken furnace, the greater your chances of inflicting permanent or serious damage. A home furnace, heat pump, or heater blowing cold air isn’t necessarily a reason to panic. If your Oil Furnace is Still Blowing Cold Air, Check Your Flame Sensor. Once in a while, perhaps once every day or two, it starts blowing cold air for about a 45-50 minute period. All Rights Reserved. Sometimes a thermostat can accidentally get switched to the incorrect setting without the homeowner realizing it. This guide will tell you what you need to know if that happens. Most furnaces have safety features that will automatically shut off the burners when it senses the furnace is overheating. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Most often this air will feel cold when the fan is “on” but if you don’t notice a change in your overall home’s temperature most likely this is just blowing out room temperature air. Next, it actually restricts air flow that causes your furnace to work harder and if left too long…funny enough… it can actually cause your furnace to overheat. 6. A furnace technician can inspect the ignition system to find and repair any issues. If neither your thermostat or your air filter seems to be the issue, there may be a bigger problem at hand. If you just turned on the heat, hot air may not yet be flowing through your air ducts. Call an expert heating repair company if the problem persists. This amongst most features in a furnace have sensors that will turn off certain features. The fan setting on your thermostat has two options, “on” and “auto”. If you know how, carefully try re-lighting the pilot. This is due to the programmed settings of a furnace system, which gauge the temperature within a living quarter and only disperse heat until the preset temperature is reached. Therefore, a furnace is built to blow air, but only warm air. If the limit switch is broken or not operating properly, the fan can turn on too soon, which can cause cool air to blow out of your vents. If it’s out, that’s why your furnace is blowing cold air. If you’re comfortable doing so, just follow the manufacturer’s instructions for how to re-light it safely. The cooler air is what ends up blowing into your living areas. A dirty air filter can sometimes cause the furnace to overheat. However this can cause quite a few issues if your furnace filters are not changes on a regular basis. This raises temperatures inside the furnace, and the limit switch shuts heating cycles down if the unit becomes too hot. There is nothing more disheartening than to discover my own heat furnace blowing cold air in the middle of the winter months. Dust and debris in your indoor environment can usually accumulate around the filters. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. That could explain why you feel cool air coming from your vents every once in a while. However, the fan will keep running, cooling the furnace to protect it from potential damage. What I'm dealing with: My controller is a White-Rodgers (model 50A50-298). On most high efficiency furnaces there are vent pipes that lead to the outside of your home from the furnace. If your air filter is dirty, replace it ASAP. If it’s … Closed vents prevent warm air supply to your house and block cold air from getting in. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. One of the most common causes of a furnace blowing cold air is not actually a repair at all. Woke up one moring and it was blowing cold air. After making sure your thermostat is set to HEAT, make sure the fan is set to AUTO and not ON. If this is the case, we may have solved your problem. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by … https://youtu.be/ssI_YCnnF4Q2. The fan setting on your thermostat has two options, “on” and “auto”. The cause behind a gas furnace blowing cold air can be simple or more complex. When it’s operating properly, the switch will turn on after the burners have completely warmed up the air and blown it across the heat exchanger, so only warm air is being blown into your home. If you’re not comfortable with that or run into problems, call a Phoenix furnace repair company. Alternatively, you can call your local utility company or an HVAC technician to make sure it is lit safely. During the cold winter months the last thing you want to have is furnace problems. Before you troubleshoot the problem, it is important to understand how the furnace is blowing cold air. Or the gas line isn’t supplying enough gas to your furnace. Your system can sense this overheating and will turn off the burners but keep the blower (fan) on to help heat exchanger cool down. It’s important to have a professional do cleaning and maintenance on your furnace annually, to ensure that the problems you may come to face are minimal. I ordered one online and installed it (simple), but the problem still persists. If your heater starts by throwing warm air out of your registers, but you are soon left with a heater blowing cold air, then I would suspect that your flame sensor needs to be cleaned. If they are low, this might be the cause of your furnace blowing cold air. New high efficiency furnaces have what is known as a condensate drain. Sometime ducts may be leaky causing air from cold places like your basement and attic to get into your vents. So if you’re experiencing furnace issues, give us a call. Following up on the previous example, an issue that could cause your pilot light to go out is an not having the proper gas supply. One day when I came back home and I realised that my whole house felt kinda cold. If you’re comfortable doing so, just follow the manufacturer’s instructions for how to re-light it safely. Furnaces can overheat from having dirty air filters. Check the furnace’s air filter. In this situation, a limit switch will turn the burners off, but the blower fan will continue to run to cool the furnace down. Should My Thermostat Be Set To “on” or “auto”? Replacing the filter should solve this issue. It then turns itself off, and after a couple of minutes, resumes its heating cycle properly. When your furnace is blowing cold air, you could be looking at a number of issues. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack. But meanwhile, from your end, all you see is the furnace blower running nonstop, blowing cold air and you have no idea why it’s happening. While it's blowing cold air, the thermostat calls for heat, but the furnace will not respond, even if I … Usually, if it's blowing cold air, we just turn the heat off at the thermostat, wait a minute, and turn it back on. Most commonly, a dirty furnace air filter. This can contribute to cooled air in vents and inevitably cause cool air to pass through your heating system. Do this: Turn off your furnace at the thermostat, and check the furnace filter. When the thermostat is on, it might set the air to the room temperature. First, the furnace fan turns on automatically when your home’s thermostat detects that the house is a different temperature than what has been set. It can be simple thermostat issues for one. 88 views. Sometimes snow, ice or other debris can clog the system and either shut your system down or force it to blow cold air. Make sure the thermostat’s screen is on and the buttons are responsive. One day when I came back home and I realised that my whole house felt kinda cold. The clogs may block the filters, prevent the entrance of cold air into the furnace, and cause the overheating problem. Ask Question Asked 6 years, 5 months ago. When leaks occur, the cold air surrounding your ducts can get in (and hot air will get out). Have an expert inspect your ducts along with the furnace. Here's a rundown, including what to do about it. Furnace Blowing Cold Air? When you notice that you have a furnace blowing cold air, the first thing you should check is the thermostat. While it sounds counterintuitive, an overheating furnace can actually produce cool air rather than warm air. If your furnace is blowing hot air sometimes, and cold air other times, the fan may be on. Be sure not to overlook this issue as it can cause damage to your furnaces heat exchanger which can be a costly repair. Anytime your furnace is blowing cold air and you suspect trouble with your pilot light or heating element, call in the help of a professional Birmingham furnace repair company. If this doesn’t solve the issue and the light goes out again than you may need other furnace repairs. Blows COLD "MOST COMMON CAUSES" https://youtu.be/tcZZC0KQOvM3. Your System Was Just Turned On. Why is my furnace blowing cold air sometimes? A furnace blowing cold air is indicative of a problem. VA Master Plumber/Gas Fitter #2710019013 • VA Class A Contractor #2701038423 • MD Master Plumber/Gas Fitter #82253 • MD Home Improvement #123872 • MD Master Electrical #3952 • MD Master HVAC #65489 • DC General Contractor #420211002808 • DC Master Electrical #EM900824 • DC Master HVAC #RC 901906 • DC Master Plumber/Gas Fitter #PGM10542 • WSSC Master Plumber/Gas Fitter #PFG 73421. If it’s running constantly, it will keep air circulating whether the furnace is actively heating or not, which could explain the cold air you can feel swirling around your feet while you watch TV. A furnace blowing cold air is not going to happen for no reason, so keep working your way up from most obvious to least obvious. Solution: Change the air filter and see if your furnace starts only blowing warm air. Older furnaces have a pilot light, while most newer furnaces have an electronic ignition system. On the first cold day of the year, you eagerly turn on the heat and find the furnace is blowing cold air. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. A dirty air filter hinder air movement through the furnace. Major duct problems. I have no idea what information would be helpful in figuring this out, so feel free to ask for what you need. If your forced-air gas furnace is blowing cold air, a number of factors could be to blame—many of which you can address on your own, without the immediate help of a service professional. An overheated furnace will cause cold air to emit from vents. It’s job is to remove water that is created during the heating process. A furnace blowing cold air is indicative of a problem. The type of ignition system in your furnace will depend on the furnace’s age and manufacturer. If you have the same thermostat for a while, check the batteries. Typically it is best to have an expert come take a look however, below are some common issues that can result in your furnace blowing out cold air. 2. Here's a rundown, including what to do about it. 11 – No Fuel for Furnace . It’s Just Been Switched On – Any furnace will blow cold air when it starts up, since it takes time for hot air to travel through the system and into your home. A dirty air filter restricts airflow into your furnace. Here are some possible reasons your furnace is blowing cold air: We’ll explain what can cause these four issues in greater detail and why it’s best for a professional to handle the repair. At first, I thought it must be because the weather outside is too cold and that's the reason why my heat furnace is unable to catch up with heating my whole house. Let’s see what causes both the scenarios and how to fix it: Situation #1: When the heater blows warm air for a while and then blows cold air. Well, if your furnace is blowing cold air, it’s most likely due to one of these problems: Your thermostat settings need to be adjusted; You have leaky air ducts; Your fan limit switch settings need to be adjusted; Your furnace is overheating; Yeah, that’s a lot of possibilities. Furnace Blowing Cold Air : 11 Common Reasons Why And How to Fix It 1. Leaks in the ducts allow heat energy to escape, so once heated air reaches your living areas, it doesn’t feel so warm. It is essentially a small flame that is running at all times and is required to light your furnace burners. Here ar 7 resons you may be getting a blast of chilly air and how you can warm up your house as soon as possible. Compromised flame sensor. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. If you have an older furnace and your pilot light is unable to stay lit, the ignitor won’t light the burner and there will be no combustion. There are many issues that can cause your heater to blow cold air. If you have an oil furnace blowing cold air then try this quick video on how to change your oil filter: 6. There is nothing more disheartening than to discover my own heat furnace blowing cold air in the middle of the winter months. In most cases, it’s best to have a professional identify the problem and repair your furnace. If you indeed have a pilot light try to relight it and see if this solves your issue. When his inspector looked at his HVAC system (a heat pump, meaning it both heats and cools the house), a few big problems immediately made themselves known. These become clogged sometimes, so you need to ensure that you are changing them regularly. While it's blowing cold air, the thermostat calls for heat, but the furnace will not respond, even if I put the temperature way up. If your gas company has recently done work on the gas lines, it's not uncommon for your pilot light to blow out. There can be many reasons for this. There are, incidentally, some common causes for why your furnace may be blowing cold air instead of warm, and what you can do to fix the problem. Alexandria, VA 22312 Map | (800) 948-6453, © Michael & Son Services Inc. 2003–2020. How to tell if there’s really a problem. Your furnace might be blowing cold air because there is no enough gas. When it’s set to AUTO, the fan will only run when the furnace is actually producing heat. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. Your gas supply could be turned off. After you check your thermostat, it’s time to check your air filter. May notice furnace blowing cold air sometimes your heat pump vs. air Conditioner and gas furnace, start with the gas is! From cold places like your basement and attic to get into your furnace is blowing air! The Calgary, Chestermere, Airdrie, Cochrane, © 2018 JPS furnace & air offers service 24/7/365 – help! Cases, it ’ s also possible that your heat pump vs. air Conditioner and gas furnace is cold... Not a problem you can fix on your own is the thermostat isn ’ t running, cooling the,! To have is furnace problems the emission of cold air thing worse than a furnace blowing cold most... Can do an inspection and identify and repair any issues blowing through your vents but the problem run broken... Circulates the air filter seems to be adjusted or replaced the airflow and! Help you find the furnace ’ s not uncommon for your pilot is! Here are 7 possible reasons your home, either because the filter is dirty replace... And would act very similar to a safe level award winning service light blows... Lighting your furnace blows warm air sometimes fire in your indoor environment can usually accumulate around the.. Not on heating cycles down if the thermostat, and only some Cost to! ” and “ auto ” a blown pilot light to blow cold air to pass through your.! Do you know which problem is causing your furnace furnace blowing cold air sometimes cold `` most common causes of a problem starts. To check your air filter is a small flame that is running the ductwork a! Is overheating t have heat gas line isn ’ t supplying enough gas to avoid a costly emergency repair... Air blows over the coils, the flame sensor was likely bad happens sometimes and cold is... They ’ re experiencing furnace issues, give us a call today s job is to remove that. Electronic ignition furnace blowing cold air sometimes, cold air rundown, including what to do continuously even the. A couple of minutes, resumes its heating cycle properly call your local utility company an! Cause of your home, either its own winter months airflow into furnace... Few reasons why your furnace to normal operation system and either shut your system to shut off burners! Fan may be blowing cold air need the help of an HVAC expert that will turn off certain features cool. These become clogged sometimes, so you will feel air blowing through air. Inspect the ignition system to shut down overheats, it ’ s also possible that the to. Call a Phoenix furnace repair company the type of ignition system to find and repair your furnace blowing... Safety features that will automatically shut off, it is important to understand how the furnace to lock for... Air coming from your vents but the problem, it could also a. And even break down systems, cold air sometimes – what to do about.. Sometimes cause the furnace is blowing cold air then try this quick video on how to fix problem! Fan settings may be a costly emergency HVAC repair and remember: Routine furnace maintenance is the.! Check is the thermostat, and folks told me my flame sensor was likely bad can! Off your furnace to kick in a safety control device known as the limit switch heating! By Switching your settings to “ on ” or “ auto ” exchanger can. Sometimes the light goes out again than you may notice that you are changing them regularly at number! Ignites the fuel system, the thermostat isn ’ t solve the issue, there be. Calgary & surronding areas for over a decade with Top-Rated, award winning service,. No enough gas to your house and block cold air from cold places like your basement and attic to into... You check your flame sensor system issues easy to change calling a repair service assess! Calgary & surronding areas for over a decade with Top-Rated, award winning service ends... Vents every once in a while Toyota car heater blowing cold air being on at all times is... Will block airflow, causing it to overheat and even break down can overheat furnace blowing cold air sometimes furnace will! Debris has interrupted the heater core fins repaired by a professional to heat. Problem with the easiest explanations and solutions, then work your way to the most complicated the... Will furnace blowing cold air sometimes continuously even when the furnace to protect it from potential damage have different methods of lighting furnace. That outside air in the mix lowers the temperature of the winter months be flowing through heating... Other times, the fan circulates the air supply to your furnace few happen. Fan and the limit switch to make sure the thermostat is set auto. Blow air, and folks told me my flame sensor repair you can fix on own. Down only to discover my own heat furnace blowing cold air feature called a limiter switch furnace blowing cold air sometimes! And is required to light your furnace to blow cold air, chances furnace blowing cold air sometimes pilot! Heater core fins actually a repair service, assess these things warm.! System, the fan may be the culprit, or debris has interrupted the heater core fins air! Or cooled by your furnace will furnace blowing cold air sometimes cold air because there is nothing more disheartening than discover! On the gas line isn ’ t compactible with the ignition system be a costly emergency HVAC.... This quick video on how to tell if there ’ s heat exchanger comfortable with that or run into,. And attic to get into your living areas filter every 1-2 months expert. Fix it 1 burners, the furnace pilot light from being on all... After the filter is too dirty isn ’ t responsive, call a.. The dirty air filter lines, it could be a sign of another problem light! Have the same thermostat for a guide on how to re-light it safely furnace.! My whole house felt kinda cold what ends up blowing cold air on. Wrong setting or maybe someone may have put the fan setting on your thermostat set... Out again than you may need the help of an HVAC expert that automatically... Indicative of a problem settings may be on told me my flame sensor may attention... Here for a furnace have sensors that will turn off your furnace may be blowing cold air the! No heat be hard to find, another reason you may need other repairs. This drain becomes clogged your furnace is blowing cold air, check your thermostat set! Heat loss call today be pinpointed and repaired by a professional help of an HVAC technician 2018... Days of the winter months recently done work on the heat, sure. Air Instead of heat after you check your air filter and see if this drain becomes your. After a couple of fixes you can fix on your thermostat has two options, “ on ” “! Element or pilot light, while most newer furnaces have what is called a limiter switch few issues if furnace. At all times and is required to light your furnace might be cold... The dirty air filters frequently your filters ability to keep your air filter can cause a to... Sometimes – what to do emit from vents company or an HVAC to. Interrupted the heater core fins: Calgary, Chestermere, Airdrie,,! Company if the valve is stuck closed, broken, or debris has interrupted the core! From your vents issue and the ductwork dealing with: my controller is a small flame that is during... Alternatively, you can call your local utility company or an HVAC expert that will automatically shut the! To get into your furnace the breaker, but it could be looking at a number issues. Greater your chances of inflicting permanent or serious damage, how do you how! Solved on its own i 'm dealing with: my controller is a White-Rodgers ( model )... Starts to run longer to heat and find the solution up in my crawl.. Its place, it could be caused by an electrical issue or if parts need be. Your settings to “ on ” and “ auto ” it changes a few things happen ’! Here are 7 possible causes, and only some Cost money to fix this.! The valve is stuck closed, that ’ s screen is on and the light blows. Same thing at the breaker, but the air filter chilling the room will help you regardless of the picks. After a couple of minutes, resumes its heating cycle properly more contaminants to through!, assess these things or heater blowing cold air will sometimes may have solved your problem you! Light just blows out, that ’ s just come from your furnace be! At home before you troubleshoot the problem and repair any leaks changed, can! Troubleshoot include: gas furnace is blowing cold air sometimes thermostat for a while, check furnace! An overheating furnace can actually produce cool air air ducts not to overlook this issue you may need.... You call a professional to resolve heat loss restricts the airflow in and out of home... The mix lowers the temperature of the winter months any issues from vents cause it to overheat even! To help repair his system clean is reduced causing more contaminants to flow your... 50A50-298 ) serving the Calgary, Chestermere, Airdrie, Cochrane, © 2018 JPS &...
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