Forced hot air furnace blowing cold air

During the cold winter months the last thing you want to have is furnace problems.

Lost password? Recover password. Remembered your password? Back to login. A furnace blowing cold air indicates that something is amiss. The furnace might have overheated, or there could be an issue with the thermostat, air filter, pilot light, flame sensor, ducts, condensate line, or gas supply. Furnaces are designed to heat homes.

Forced hot air furnace blowing cold air

Your furnace is blowing cold air. You wait, but the temperature in the house drops. What could have gone wrong? Some solutions are easy fixes. Some require an HVAC contractor with a good tool kit. So why is your furnace blowing cold air? When a gas furnace first starts, it goes through a warm-up cycle. Another setting may be the cause. It only sets the blower in action. One more simple mistake can be remedied easily.

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Furnace maintenance is one of those things that many people put off until winter hits, and they realize that something is wrong. If your find your furnace blowing cold air, here are a few tips to help you find, and potentially fix, the root of the problem. Your furnace fan runs whenever the thermostat calls for heat. You can change it so that it only runs when necessary. However, if you live with other people, you may want to keep an eye on who is pushing the thermostat buttons.

Chances are, if the temperature has unexpectedly plummeted inside your home, you may have an issue with your furnace. Before you figure out the problem, it helps to learn a little about how your home heating system might work. The furnace produces heat by burning natural gas or heating oil. When the thermostat is turned on, a pilot light or electronic igniter lights the fuel in a combustion chamber, which begins to warm the heat exchanger, located just above the combustion chamber. A blower fan directs air across the heat exchanger, and when the temperature reaches a certain point, the fan comes on and blows the heated air out into the heating ducts and into the interior of the house. Cooler air cycles back through return ducts into the furnace, and the process starts all over. Walk through the steps below to help you determine why your furnace is blowing cold air.

Forced hot air furnace blowing cold air

If your furnace blows cold air sometimes, you most likely have dirty air filters or blocked air vents. However, it could also be something as minor as the wrong thermostat setting or as complex as electrical circuity failure. Nevertheless, you need to act quickly. Otherwise, you may find yourself in the cold for longer than you thought. Below, we discuss the most common reasons why furnaces blow cold air and recommended fixes.

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If you sense your furnace blowing cold air briefly, but the air is swiftly exchanged for warm air, this is most likely the cause. High limit switches are designed to protect the compressor from overheating by shutting off power to the compressor. Since the new air filter will not block airflow to your gas furnace, the unit will no longer overheat. Troubleshooting a Furnace Blowing Cold Air. When the circuit control board receives the heating cycle command from the thermostat, it sends out signals to turn on the furnace blower and furnace burner. Nine Benefits Of Faucet Aerators. Gas is highly flammable! We're Hiring. Water Heaters. Flame Sensor Issues If the flame sensor is dirty or worn, it will not be able to detect the flame correctly and will cause the furnace to shut off. How To Prevent Electrical Fires:…. Wall and Ceiling Stains? Burner Issues Burners are designed to burn fuel at a very high temperature. These issues can cause incorrect signals to be sent to the furnace.

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Heat Not Working in House? Contact us for complete details. The result is your heater blowing cold air. So you will feel air blowing through your vents but the air is not heated or cooled by your furnace system. So, what caused your furnace problem? Google YouTube. When a gas furnace first starts, it goes through a warm-up cycle. New customer? How to Stop a Home…. Here are some things you can do before calling in a professional:. DO NOT ignore this problem. Are you sensing a pattern here? Incorrect Wiring A recently installed thermostat might be wired incorrectly or incompatible with the system. Have you noticed your furnace is not working in your home?