When you first activate your furnace in Lebanon, TN, the air might feel cold for a few minutes. This is normal because the furnace is expelling cold air from the ductwork. However, if the air doesn’t heat up, your HVAC system might be malfunctioning, and here are some reasons why that may happen.
Thermostat Settings
If you live with other people, make sure that they didn’t turn off the heat. Check the fan setting and change it to “Auto” if it’s set to “On.”
Dirty Air Filters
Over time, your air filters accumulate dust, particles and pollutants. Routine maintenance ensures clean air filters, but if you haven’t replaced them in a while, you might have filters clogged with debris. This forces your HVAC system to work harder to push air through the house.
Your system may shut down when it overheats, resulting in cold air. Overworking your HVAC system can also increase your energy bills.
Closed Vents
You might’ve heard that closing vents in rooms that you don’t use will reduce your energy use. In fact, closing too many vents prevents normal air circulation, which can make the system overheat and shut down.
Reopen every vent in your house, and see if the air heats up. Leave as many vents open as possible.
Leaky Ducts
Hot air can escape through leaks in the ductwork, warming the wrong areas of your house. If you have holes and cracks in your ductwork, you might also notice excessive dust and dirt in the air.
When your furnace blows cold air, schedule an appointment for heating services with Derryberry’s Heat & Air. Our team will discover and repair the issue and get your home ready for the cold weather ahead.
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