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Why Is My Furnace Fan Running Constantly?

Heating & Cooling


A common furnace repair complaint we hear from Lexington homeowners is that their furnace fan runs constantly. This problem may occur while using your heating or cooling systems, as the furnace fan works with both systems to distribute conditioned air throughout your home. If you notice this problem, there are a few steps you can take to solve the issue before calling Climate Control for repairs.

My furnace fan won’t shut off — what should I do?

Step 1: Check your thermostat. When using heating, set your thermostat a few degrees above the current room temperature. For cooling, set the thermostat a few degrees lower than the current room temperature. Doing so should signal the system to turn off; if the furnace fan does not turn off after a few minutes, move on to Step 2. • Step 2: Check your thermostat’s fan switch. Make sure the fan switch has not accidentally been set to “on”. If it is set to “auto” or “off”, it should not constantly run.

When to call for repairs for a furnace fan

If the measures above fail to stop your furnace fan, it’s time to give us a call for furnace repair. Your constantly running furnace fan may be caused by a faulty fan relay, wiring short, thermostat malfunction, or a problem with your furnace fan’s limit switch.

Our NATE-certified technicians will thoroughly inspect your furnace fan in order to identify the issue causing it to constantly run. We will review our findings with you and propose a solution for fixing the problem. Our team will perform accurate and timely repairs to prevent this problem from continuing, which will eliminate unnecessary operating noise and energy consumption.

If your furnace fan is blowing constantly and the above steps haven’t solved your problem, please contact Climate Control for fast and effective furnace repair in Lexington.

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