Four Reasons Why Your Furnace Is Blowing Out Cold Air

Tower Heating and Air on October 21, 2022

It’s finally starting to cool down in North Carolina (talk about that freeze warning the other day!) and most likely you’re gearing up to turn the heat on in your home. If you turn your heat on for the first time and experience cold air blowing into your home, fret not! It’s not a ghost (!), and likely just a small problem that we at Tower Heating & Air could easily fix! 😉 See below for why your furnace may be blowing cold air, and then give us a call to come check it out.

Broken Thermostat

The thermostat sends a message to the furnace to turn on the blower and burner. If you have a faulty thermostat, most likely it’ll only send the message to turn on the furnace blower and not the burner. So, it might be time to get a new thermostat!

Faulty Circuit Control Board

The brain of the furnace, the circuit control board relays instructions to its various components. If the circuit control board is malfunctioning, it could also turn on the furnace blower, but not the furnace burners. The most common cause of a faulty circuit control board is a lack of cleaning and maintenance, so make sure you do that often! If your furnace is leaking water, that’s an emergency, so call us ASAP!

Ignition Issue

Inside your furnace is small pilot light/electric furnace ignition that ignites the burners. If it’s broken, the burners won’t ignite and your furnace will blow out cold air.

Lack of Fuel

If you have a gas furnace that’s blowing cold air, it could be because of a bad gas valve or lack of gas. Make sure to consistently keep the tank filled so as not to have any problems in the future!

We’re Here to Help

Is your furnace blowing out cold air but you’re not sure why? Or do you have a broken part that needs fixing/replacing? That’s where we come in! We’d be happy to come check out your situation. Give us a call at 919-823-6624—and consider purchasing our Peace of Mind Membership Plan to ensure that your HVAC unit is always running properly (we do regular checks and maintenance!).