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What to Do If Your Furnace Is Blowing Cold Air

Man and woman on couch.

4 Reasons Why Your Furnace is Blowing Cold Air

It's the middle of winter, and your furnace is running around the clock to keep your home warm. But then, all of a sudden, you notice that the air coming out of the vents is cold. You panic and start to wonder what could be wrong. Is your furnace broken? Do you need to call a professional?

In most cases, a furnace blowing cold air is not cause for alarm. More often than not, it's a problem that a professional can easily fix. In this blog post, we'll take a look at four common reasons why furnaces start blowing cold air and what you can do about it.

1. The thermostat is set to "cool."

This one is pretty easy to fix. If your thermostat is set to "cool," your furnace will naturally blow out cold air. Just flip the switch to "heat," and you should be good to go!

2. The pilot light is out.

If your pilot light has gone out, you'll first want to check the batteries in your thermostat. If they're working, then the next step is to relight the pilot light according to the instructions in your furnace's owner's manual. If you're uncomfortable doing this yourself or the pilot light won't stay lit, then it's time to call a professional.

3. The furnace filter is dirty.

A dirty furnace filter can restrict airflow and cause many problems, including a furnace that blows cold air. To clean or replace your filter, simply follow the instructions in your furnace owner's manual. Most filters can be found at your local hardware store if you don't have one on hand.

4. There's a problem with the blower motor.

If none of the above solutions solve the problem, then there's likely an issue with the blower motor—a part that should only be serviced by a trained professional for heater repair. If this is the case, shut off your furnace immediately and give us a call so we can look at it for you.

Schedule Your Heating Inspection!

There are a number of reasons why your furnace might start blowing cold air. If you can’t pinpoint the cause, our expert technicians at A. Fagundes Plumbing & Heating Inc. are here to help solve all of your home heating problems. Give us a call today at (978) 350-5522 to schedule your appointment with us!

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