A furnace cycle should last approximately 10 to 15 minutes unless it is a particularly cold day in Woodbine, GA, which does not happen often. If your furnace runs without stopping, something is likely wrong. Here are some possible reasons your home’s furnace will not turn off:
Clogged Filter
It is recommended to change your filter every two to three months to maintain efficiency. A maintenance service technician can also inspect it during tune-up appointments.
Replacing your filter is important because clogged filters reduce airflow. This leads to longer run times for your furnace and potentially higher monthly bills, as the system will use more energy to do its job.
Bad Limit Switch
Another possibility is that the limit switch has failed. This component tells your furnace to shut down once it reaches the set point. If signals are not sent or are sent incorrectly, your furnace will not know when to end its cycles.
Uncalibrated Thermostat
The limit switch cannot do its job without accurate input from the thermostat. Over time, the thermostat’s sensors may lose their calibration. Your thermostat might not be sending the signal because it incorrectly detects the indoor temperature as being lower than the actual measurement.
Fan in “On” Mode
It may also be a simple matter of the fan being in the “on” mode. In this setting, it will run even when the furnace has stopped heating. Switch the fan to either “off” or “auto” mode, so it runs only while the furnace is in operation.
In addition to flexible scheduling, we offer 24/7 availability to respond to emergencies. Your satisfaction is important, and our NATE-certified service technicians are committed to quality work. Ed's Comfort Solutions can send a service technician to your home in Woodbine, GA, to perform the necessary repairs. Call today if your furnace refuses to turn off.
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