Why Is My Furnace Blowing Cold Air?

Why Is My Furnace Blowing Cold Air?

Why Is My Furnace Blowing Cold Air?

If your furnace starts blowing cold air then it’s time to start investigating. The last thing you want to happen is in the middle of a cold day to discover that the furnace is having problems, but sometimes it does happen, and there are a number of reasons for it.

Check that the thermostat is on – Even though the fan is running maybe the heater is not blowing hot air, and as a result, any air that blows out of the vents when the heater is off will feel cold. If the thermostat setting is the problem then the solution is easy: Make sure that the thermostat is ON. When restored to the correct setting, your furnace should start blowing warm air again.

The furnace overheated – If the furnace blows hot air, and then cold air, but then it stops altogether, then it could be possible that it is overheated. In this case, the furnace safety device turned its burners off. In most cases, the furnace overheats because of a dirty furnace air filter. The problem is not to be ignored, because frequent overheating could damage the heat exchanger, which would get hurtful for your budget once you have to replace it. Replacing the air filter is the best solution.

The pilot light might be out – In this case, the heater is not lighting the fuel. In order to confirm that this is the problem, try to relight it according to your heater’s instruction. If relighting it doesn’t work, check the gas supply to make sure the gas valve is on. Otherwise, there is a change that you have a dirty pilot light which needs to be cleaned in order to make sure that the gas flows properly.

These are the 3 main issues that are most likely but are not the only possible options. The heater could have inadequate gas supply (in which case the gas is either turned off or not supplying enough gas), there could be duct problems or condensate clogs. In any case, if you want to learn more about this issue and what you need to do, check out our site to see more.


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