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You're working hard to save energy this winter, but for some reason, your furnace won't stop blowing. No matter what you do, the air continues whether it's hot or not. There are several potential reasons for a nonstop blower. Here's how to deal with it.
Thermostat Issues
The simplest potential reason why you have a nonstop blower is because the fan setting on your thermostat is set to "On." This is particularly likely if the air coming from the vents isn't warm. Leaving your fan on constantly can improve air circulation and heat distribution. However, it also raises your energy bills significantly and could wear out your system more quickly. Switch the setting to "Auto" so the fan only turns on when the heat turns on.
There might also be a problem with the temperature setting. If the thermostat is set too high, your furnace will have a harder time getting your home to the set temperature and may run continuously instead. Lower your thermostat to 68 degrees, then wait a few minutes to see if it stops. Keep your thermostat at a reasonable but comfortable temperature to reduce energy usage and save wear and tear on your system.
If your thermostat is already set to 68 degrees and you still have a nonstop blower, it might be calibrated incorrectly. Call your HVAC technician to check the calibration and reset it so you can heat and cool your home more accurately.
Fan Limit Switch
If your thermostat isn't the issue, it might be the fan limit switch on the unit. The switch determines when the blower will start and stop. However, it also has a manual switch that keeps it going constantly.
Check around the heat exchanger, right behind the gas valve, for a small button. If the button is pressed in, it's in override mode. Pull it out and the fan should stop. If, after a few minutes, it still keeps running, you call your HVAC contractor to determine the problem.
If you're experiencing a nonstop blower or other HVAC issues, contact us at Air Assurance. Broken Arrow's home comfort is our top priority.