Here's Why Your Furnace Is Blowing Cold Air - Frederick Air, Inc.

Here’s Why Your Furnace Is Blowing Cold Air

In the fall and winter, when the temperature outside is very low, it’s essential to have a good heating system in your home. That’s why your furnace needs to work properly during those cold months. If it starts blowing cold air all of a sudden, it might be caused by the following:

Main Reasons for Why Your Furnace Is Suddenly Blowing Cold Air

● The thermostat isn’t working correctly.

Your thermostat is the first thing you need to check when something is wrong with the heating system. Make sure you have thermostat set to heat and temperature set above room temperature.

If you’ve recently installed the thermostat on your own, the problem could instead lie in the fact that it’s not compatible with the heating system. You should consult with an expert to see if this is the case.

● The furnace has overheated.

Yes, the furnace can overheat, and not many people are aware of this. It usually happens if you haven’t changed your air filter in a while. When you don’t change it, the dirty filter will not allow air to flow properly and cause unit to cycle on high limit.

You only need to change the air filter and restart the furnace, and it should start blowing warm air once again.

● Gas issues.

Furnaces need gas to function correctly. If gas pressure is low, the furnace could continue to work, but it will not produce the correct amount of heat to keep your house warm. If you think this is the issue, you should not attempt to fix it on your own under any circumstances! Instead, call a professional who knows what to do.

Old furnaces have pilot lights that are turned on all the time. If the pilot has gone out, you need to relight it. Naturally, you should only do this if you know how, and if you don’t, it’s best to get a professional to do it.

● Oil Heat

No heat, always check your oil tank to be sure you have oil and the furnace switch on and calling for heat.

● A problem with computerized controls.

If you have a new furnace with an electronic control panel, the problem can be located in that very panel itself. Sometimes they glitch out, so you should try resetting the system by turning off the furnace using the power switch. Turn it back on after a few minutes. Try this only one time, if the furnace does not work call for service.

Key Takeaways

The issues we’ve explained here are usually the causes of furnaces blowing cold air. If you can fix some of these issues on your own, you will be able to get the furnace fixed in no time.

On the other hand, if you can’t, you should always call a professional like Frederick Air, and we will send someone to get your furnace blowing hot air in no time.


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