What Is Causing Your Furnace to Blow Cold Air?

Your heating system should heat, not blow cold air! If you’re facing this problem, your furnace may need a professional inspection or you can fix it yourself. We’ll walk you through the DIY solutions.

DIY Solutions

Your Thermostat Fan is Set to “On”

Every thermostat has similar basic settings. One that you will see on all of them is the fan setting. You’ll be able to toggle between “on” and auto”. When the fan is on, your furnace fan will always run, even if your furnace is not heating air. This leads some to think there is an issue with their furnace when in actuality the fan is blowing air that was never meant to be heated in the first place.

If you set your system to “auto”, the fan will only push the heated air directly from the furnace through your ducts and into your home.

Setting the fan to “auto” will save you money in the long run, but some homeowners like the constant circulation from the “on” setting. Just don’t get concerned when the air coming from your vents isn’t as warm as you expected.

Change Your Air Filter

When was the last time you changed your air filter? Are you even sure where your air filters are? If you don’t know the answer to either of those questions, your filters are likely caked with dirt and allergens. This can get so bad that airflow is restricted and your furnace can start to overheat. In situations like this your system will shut itself down for safety and your vents won’t be supplying the warm air you need in your home. Replace your filters and the furnace should adjust. If you’re still having issues, consult with our HVAC experts.

See a Same Day Service Pro

Pilot Light Issues

When you check on your furnace, you should see a soft, constant blue flame igniting your burners. If it’s not igniting properly or looks orange, you should speak to a pro.

Gas Supply Issues

Your furnace needs gas to function. If you have a leak preventing your furnace from getting the fuel it needs, you need a repair as soon as possible.

Duct Leaks

If cold air is coming from your vents, your heater may have nothing to do with it! Your ducts can bring in outside air and distribute it throughout your home, all while letting all of that warm, furnace-heated air out. One of our technicians can take a look and see how we can fix the problem.

Anderson Plumbing Heating and Electric can help you with furnace repairs and maintenance. Give us a call at (334) 231-6980 or fill out an online contact form!

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