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Troubleshooting a Furnace Blowing Cold Air

Couple wearing winter coats while inside due to a broken furnace

You notice that your home isn’t heating up even though you turned the thermostat up a while ago. When you put a hand new your air vents, you notice that the air coming out is cool. Now what?

In this article, we’ll tell you how homeowners can troubleshoot a furnace that’s blowing cold air. Then, we’ll help you get the help you need to repair your faulty furnace.

Troubleshooting Steps

There are a few steps you can take to troubleshoot your furnace that’s blowing cold air. Try the following:

Check the Pilot Light

Go to your furnace and take a look at the pilot light. If it’s out, your furnace won’t burn fuel, which explains why it’s blowing cold air. If you know how to do so safely, you can relight the pilot light yourself or hire a knowledgeable, local HVAC professional who can light it for you.

Look for Leaks

Is there water pooling around your furnace? This could be due to a blockage in the water heater’s drain line. Your furnace will turn off in this situation to prevent further damage to the unit. If you see standing water, you’ll need to clean it up with towels or a wet vacuum, and then reach out to a furnace expert who can clear the drain clog quickly and turn your furnace back on.

Inspect the Control Panel

You may be able to fix a furnace that’s blowing cold air by resetting the control panel. Simply turn the power to the furnace off, wait a couple of minutes and turn it back on again. If the issue isn’t resolved, reach out to an HVAC contractor.

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Change Your Air Filters

Dirty air filters can keep your furnace from working properly. If your air filters haven’t been changed in a long time, or they’re coated in dust and dirt, change them ASAP to keep your airflow from being blocked.

Check Your Gas Supply

Your gas furnace burns fuel to warm up your home. If the fuel supply is low, your furnace may turn off automatically. Your gas supply can be easily replenished by a professional, but we don’t recommend attempting this repair yourself.

Examine Your Ductwork

Are your air ducts leaky? If air is escaping from your ductwork, the air that comes out of your air vents may be cooled off by the time it reaches the vents. Plus, this will cause your furnace to work harder and could shorten its service life. Let an HVAC contractor inspect your ductwork for leaks and seal them if needed.

Call Cranney Home Services for Furnace Repairs

If your furnace is blowing cold air and the following troubleshooting steps don’t fix the issue, you need to reach out to a skilled HVAC contractor. Cranney Home Services offers speedy, reliable furnace repairs for homeowners in and around the North Shore and Merrimack Valley. With over 35 years of experience, we have the skills and knowledge needed to handle your heating repairs easily.

Contact us online or call (978) 750-6900 today to set up furnace repair services with a member of our team.

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