Reasons Why Your Furnace Is Blowing Cold Air

Reasons Why Your Furnace Is Blowing Cold Air

Picture this: It’s the middle of January, temperatures are below freezing, and one night your furnace decides that it’s a good idea to blow cold air instead of warm air. This sounds like a story that’s all too familiar doesn’t it? When your furnace starts blowing cold air, there are a few reasons why.

Reason #1: Lack of Fuel
Naturally, if there is no fuel feeding into the furnace, it won’t produce heat. First check to see if your furnace has a steady supply of natural gas, oil, or that the electric switch is turned on (depending on which type of furnace you have). Afterward, check to make sure that the gas supply valve is completely open, the oil filters are not clogged and causing blockages, or that the circuit breaker isn’t breaking.

Reason #2: Needs to Be Reset
If your furnace is relatively new, there’s a chance it is computer controlled. Every once in awhile these furnaces will glitch, causing them not to work properly. Most of the time they can be quickly fixed by resetting the furnace’s computer. Switch the furnace off, wait at least 30 seconds, and turn it back on to complete the reboot.

Reason #3: Large Air Leaks
Sometimes the reason your furnace is blowing cold air isn’t because of the furnace — it’s because of air leaks within the ductwork. If there are any holes, cracks, gashes, or slits in your ductwork, warm air can escape before it has a chance to reach the registers and vents. Hire a professional HVAC technician to check and seal your ductwork.

What good is a furnace in the winter time if it’s only blowing cold air into your home? When your furnace or ductwork needs repair, contact the HVAC pros at Tri-City Appliance, Plumbing, Heating & Cooling. To learn more, or to schedule an appointment, give us a call at (203) 303-5700.


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