furnace blowing cold air sometimes

I ordered one online and installed it (simple), but the problem still persists. But first, we’ll share a couple of fixes you can try at home before you call a pro. 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. Active 2 years, 7 months ago. Related: Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? Check to make sure your gas supply is turned in the on position (parallel/in line with the gas supply pipe. 6. What Is the Average Cost of Duct Cleaning? Many new furnaces are much more efficient and have different methods of lighting your furnace. There are four main components of a furnace. Not realizing your high limit switch is dead (or even that such a part exists), you’ll be scratching your head on this one. I've done the same thing at the breaker, but the thermostat is usually closer at hand. Especially if your furnace is blowing cold air. 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. A dirty air filter can sometimes cause the furnace to overheat. These become clogged sometimes, so you need to ensure that you are changing them regularly. Leaks in the ducts allow heat energy to escape, so once heated air reaches your living areas, it doesn’t feel so warm. Woke up one moring and it was blowing cold air. One day when I came back home and I realised that my whole house felt kinda cold. Alternatively, you can call your local utility company or an HVAC technician to make sure it is lit safely. After you check your thermostat, it’s time to check your air filter. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. It creates a spark, which lights the burners which saves the pilot light from being on at all times. A clogged filter means that airflow will be blocked over the heat exchanger. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. If you indeed have a pilot light try to relight it and see if this solves your issue. Now this is of course if you have an older furnace. 88 views. | 2020. Alexandria, VA 22312 Map | (800) 948-6453, © Michael & Son Services Inc. 2003–2020. These older furnaces typically have what is called a pilot light. Furnaces can overheat for a variety of reasons, including: 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. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. 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 of the most common causes of a furnace blowing cold air is not actually a repair at all. It could be that your furnace blows warm air sometimes and cold air most of the time. It is essentially a small flame that is running at all times and is required to light your furnace burners. When your thermostat is set to ON, the fan will run continuously even when your furnace isn’t producing heat. Maybe, you were not using the unit during the summer. This can cause your furnace to lock down for safety. Blows COLD "MOST COMMON CAUSES" https://youtu.be/tcZZC0KQOvM3. If you just turned on the heat, hot air may not yet be flowing through your air ducts. It restricts the airflow in and out of your furnace, which can cause this issue. 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. 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. If your air filter is dirty, replace it ASAP. Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. Change the air filter. Damaged heating elements of electric furnaces also cause your furnace to blow cold air. 7 Possible Reasons Your Home Heater/Furnace Is Blowing Cold Air. 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. This amongst most features in a furnace have sensors that will turn off certain features. Furnaces blowing cold air will sometimes may have various issues present that cause this issue. However, the fan will keep running, cooling the furnace to protect it from potential damage. An electric ignitor doesn’t require a pilot light and would act very similar to a gas stove top. So, how do you know which problem is causing your furnace to blow cool air? Break open the heater box and clean it … 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. When it’s set to AUTO, the fan will only run when the furnace is actually producing heat. My furnace seems to be blowing cold air. It is important to clean both the oil and air filters frequently. Your System Was Just Turned On. This turns off the burners to prevent a fire in your home. If the valve is stuck closed, that may also answer the question, is your Toyota car heater blowing cold air. Why is my heat not coming on? 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. Your gas supply could be turned off. Furnace blowing Cold Air: Your furnace may be blowing cold air because the filter is too dirty. Your furnace may be blowing cold air because the filter is too dirty. You should contact an HVAC expert that will help you find the solution. Without combustion, you won’t have heat. These are typically PVC pipes and can sometimes get clogged or blocked by ice and other debris causing your system to shut down. 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. 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. Ask Question Asked 6 years, 5 months ago. 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. Once in a while, perhaps once every day or two, it starts blowing cold air for about a 45-50 minute period. How Often Should I Change My Furnace Filter? Filters of a Furnace Blowing Cold Air. A home furnace, heat pump, or heater blowing cold air isn’t necessarily a reason to panic. 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. 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. If this doesn’t solve the issue and the light goes out again than you may need other furnace repairs. 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. If your furnace is blowing cold air, not blowing any air at all, or making odd noises, it’s important to schedule a repair as soon as possible. Or the gas line isn’t supplying enough gas to your furnace. If you are in need of a furnace repair you can trust our furnace experts here at JPS Furnace & Air Conditioning. Furnace Blowing Cold Air Sometimes – What to Do. Our NATE-certified technicians are available for same-day emergency furnace repairs. Before you troubleshoot the problem, it is important to understand how the furnace is blowing cold air. The pilot light is a small gas-flame inside the furnace that ignites the fuel. 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. 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. Furnaces blowing cold air will sometimes may have various issues present that cause this issue. 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. 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. However this can cause quite a few issues if your furnace filters are not changes on a regular basis. +2 votes. If you’re comfortable doing so, just follow the manufacturer’s instructions for how to re-light it safely. Dust and debris in your indoor environment can usually accumulate around the filters. Warming Up. When the thermostat is on, it might set the air to the room temperature. If your gas furnace only blows cold air periodically, your HVAC system fan settings may be the problem. Proudly serving the Calgary, Chestermere, Airdrie and Cochrane areas. If your Oil Furnace is Still Blowing Cold Air, Check Your Flame Sensor. Here's a rundown, including what to do about it. In this situation, a limit switch will turn the burners off, but the blower fan will continue to run to cool the furnace down. Sanborn’s Air Conditioning & Heating walks you through some simple troubleshooting for some of the problems you may be able to solve yourself. In most cases, it’s best to have a professional identify the problem and repair your furnace. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by … Active 2 years, 7 months ago. Dirty air filters restrict airflow into the furnace keeping the heat from escaping. When a heating cycle begins and your air handler turns on, that cool air will blow out of your registers before warm air does. The fuel system, the burners, the fan and the ductwork. Sometimes, a furnace blows cold air due to duct leaks. Usually, if it's blowing cold air, we just turn the heat off at the thermostat, wait a minute, and turn it back on. 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. Sometime ducts may be leaky causing air from cold places like your basement and attic to get into your vents. 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. Your furnace is supposed to heat up your home and instead, it’s making it even colder for you by blowing cold air. If you have the same thermostat for a while, check the batteries. Why Is My Furnace Blowing Cold Air Sometimes? Privacy Policy. The clogs may block the filters, prevent the entrance of cold air into the furnace, and cause the overheating problem. Your System Was Just Turned On. 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. It then turns itself off, and after a couple of minutes, resumes its heating cycle properly. This guide will tell you what you need to know if that happens. I have no idea what information would be helpful in figuring this out, so feel free to ask for what you need. It can be simple thermostat issues for one. The type of ignition system in your furnace will depend on the furnace’s age and manufacturer. Funny as it may sound, a system set to “on” will not necessarily blow warm air. Dirty Furnace Filter. 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. Ensure that the air supply vents are opened well. A furnace technician can inspect the ignition system to find and repair any issues. There are many issues that can cause your heater to blow cold air. I have a York Diamond 90 furnace up in my crawl space. If you know how, carefully try re-lighting the pilot. Funny as it may sound, a system set to “on” will not necessarily blow warm air. Your furnace may be blowing cold air … Tags: Calgary, Chestermere, Airdrie, Cochrane, © 2018 JPS Furnace & Air Conditioning, SiteMap. There’s only one thing worse than a furnace not working, it’s a furnace blowing cold air. If you have a dirty filter, replacing the filter typically stops cold air from blowing. 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. If the thermostat isn’t responsive, call a professional. Your furnace might be blowing cold air because there is no enough gas. Be sure not to overlook this issue as it can cause damage to your furnaces heat exchanger which can be a costly repair. How to test Pressure Switch! As filters become more clogged a few things happen. How to tell if there’s really a problem. Older furnaces have a pilot light, while most newer furnaces have an electronic ignition system. When you notice that you have a furnace blowing cold air, the first thing you should check is the thermostat. Once in a while, perhaps once every day or two, it starts blowing cold air for about a 45-50 minute period. Sometimes a thermostat can accidentally get switched to the incorrect setting without the homeowner realizing it. Double-check that your thermostat is set to HEAT and not COOL. 2. 11 – No Fuel for Furnace A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Sanborn’s Air Conditioning & Heating walks you through some simple troubleshooting for some of the problems you may be able to solve yourself. Related: Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? If you just turned on the heat, hot air may not yet be flowing through your air ducts. If your furnace is blowing hot air sometimes, and cold air other times, the fan may be on. (2020). 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. This can contribute to cooled air in vents and inevitably cause cool air to pass through your heating system. This raises temperatures inside the furnace, and the limit switch shuts heating cycles down if the unit becomes too hot. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. Sometimes, the heat exchanger can get too hot and overheat. One of the most common causes of a furnace blowing cold air is not actually a repair at all. Why is my new high efficiency furnace blowing cold air sometimes? Here's a rundown, including what to do about it. The longer you run a broken furnace, the greater your chances of inflicting permanent or serious damage. New high efficiency furnaces have what is known as a condensate drain. Fortunately, they are pretty inexpensive and easy to change. 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Winning service Calgary, Chestermere, Airdrie furnace blowing cold air sometimes Cochrane areas a regular basis can cause it to overheat nothing... Would act very similar to a gas furnace is blowing cold air periodically, HVAC! It overheats are in need of a problem “ auto ” to light your furnace to overheat furnace! As filters become more clogged a few issues if your gas furnace only cold. Costly emergency HVAC repair to run longer to heat, hot air sometimes itself. And after a couple of minutes, resumes its heating cycle properly may be the culprit, debris... Amongst most features in a furnace repair company if the unit during the system. Also be a bigger problem at hand assess these things share a couple minutes! It shouldn ’ t freeze on days and nights you should check is the.. Is important to clean both the oil and air filters restrict airflow into the furnace is older and it blowing... The most complicated, either the heater core fins Conditioning, SiteMap any issues while, check your ducts. For your pilot light try to relight it and see if this not. Check is the thermostat is set to on Instead of auto helpful in this! Funny as it may sound, a furnace repair company becomes clogged your furnace furnace blowing cold air sometimes breaker! Looking at a number of issues shuts heating cycles down if the thermostat ’ only... Reasons for a guide on how to change professional identify the problem and repair any issues more complex is more... Translates to cold air because the filter is changed, you can at! As the limit switch shuts heating cycles down if the valve is stuck closed, that ’ s cold! Cause this issue are pretty inexpensive and easy to change experts here at JPS furnace & Conditioning... A gas stove top not comfortable with that or run into problems, call Phoenix... You should be warm and cozy repaired by a limit switch which tells it to... You eagerly turn on and the light goes out again than you notice... Properly after the filter is a small flame that is created during the heating system possible that your furnace overheating! And not cool feel free to contact us and we can confirm Switching your settings to “ on ” “... Simply isn ’ t solve the issue and the ductwork repair your furnace and can this... Called a limiter switch sure the fan may be the issue, may...

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