why is my furnace blowing cool air

If your furnace is blowing cold air, were sorry! Its a chilly problem that no one should have to deal with during winter in the Atlanta area! There are several possible causes for a furnace blowing cold air, so its hard to give you advice without more information. But here are 3 common causes you can fix yourself. 1) Thermostat is set to ON Is your furnace blowing cold air only sometimes? Is the furnaces blower constantly running? Check your thermostat. (Thats where a tech will start first, so you should as well. ) If your thermostats fan setting is set to ON, the furnace blower will constantly run even when your furnace isnt heating the air. Solution: Turn your thermostats fan setting to AUTO. Now your furnace will only blow warm air. 2) Furnace overheated Lets say your furnace blows hot air, then cold air, but then stops blowing any air at all after a while. Whats the problem? Its possible your furnace overheated. If so, the limit switch, a furnace safety device, turned the furnace burners off. The blower keeps blowing to cool the furnace down to a safe level. So what causes the furnace to overheat? Most commonly,
a dirty furnace air filter. The dirty air filter will block airflow, causing the furnace to run longer to heat your home until it overheats. Solution: Change the air filter and see if your furnace starts only blowing warm air. DONT ignore this problem. Repeated overheating will hurt the furnaces heat exchanger, which is expensive to fix. 3) Pilot light is out If your gas furnace is only blowing cold air, then the pilot light may be out. Check to see if it is and try these solutions: Solution 1:. If the flame stays on, great!


Solution 2: If the pilot refuses to light, ensure that gas is flowing into the furnace. Make sure the furnaces gas valve switch is in the on position (parallel/in line with the gas supply pipe. if the switch is on, then check to see if the pilot light is dirty. if it is, clean it to allow gas to come through. Solution 3: If the pilot lights, but wont stay lit, then theres a problem with the thermocouple (the copper rod you see the pilot flame hitting). It needs to be adjusted or replaced. If you dont feel comfortable doing this, please. Still having problems?. Give us more details about your problem, and well get back to you ASAP! Ragsdale Air Conditioning, Heating and Plumbing has been serving the metro Atlanta area for over 20 years. for more information on how we can help you. If your furnace is blowing cold air, were sorry! Its a chilly problem that no one should have to deal with during winter in the Atlanta area! There are several possible causes for a furnace blowing cold air, so its hard to give you advice without more information. But here are 3 common causes you can fix yourself. 1) Thermostat is set to ON Is your furnace blowing cold air only sometimes? Is the furnaces blower constantly running? Check your thermostat. (Thats where a tech will start first, so you should as well. ) If your thermostats fan setting is set to ON, the furnace blower will constantly run even when your furnace isnt heating the air. Solution: Turn your thermostats fan setting to AUTO. Now your furnace will only blow warm air. 2) Furnace overheated Lets say your furnace blows hot air, then cold air, but then stops blowing any air at all after a while.


Whats the problem? Its possible your furnace overheated. If so, the limit switch, a furnace safety device, turned the furnace burners off. The blower keeps blowing to cool the furnace down to a safe level. So what causes the furnace to overheat? Most commonly, a dirty furnace air filter. The dirty air filter will block airflow, causing the furnace to run longer to heat your home until it overheats. Solution: Change the air filter and see if your furnace starts only blowing warm air. DONT ignore this problem. Repeated overheating will hurt the furnaces heat exchanger, which is expensive to fix. 3) Pilot light is out If your gas furnace is only blowing cold air, then the pilot light may be out. Check to see if it is and try these solutions: Solution 1:. If the flame stays on, great! Solution 2: If the pilot refuses to light, ensure that gas is flowing into the furnace. Make sure the furnaces gas valve switch is in the on position (parallel/in line with the gas supply pipe. if the switch is on, then check to see if the pilot light is dirty. if it is, clean it to allow gas to come through. Solution 3: If the pilot lights, but wont stay lit, then theres a problem with the thermocouple (the copper rod you see the pilot flame hitting). It needs to be adjusted or replaced. If you dont feel comfortable doing this, please. Still having problems?. Give us more details about your problem, and well get back to you ASAP! Ragsdale Air Conditioning, Heating and Plumbing has been serving the metro Atlanta area for over 20 years. for more information on how we can help you.

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