How to Troubleshoot a Heat Pump With a Furnace Fan That Stays on


The blower fan of a heating system is responsible for distributing warm air into the rooms in your home or office, so it is important to make sure it functions properly. Heat pumps provide the heat and work especially well for moderate climates such as those in southern regions. If the blower fan doesn't turn off, this could be attributed to problems related to improper thermostat settings, a damaged gas valve and more. Before calling an expert, a few troubleshooting guidelines may solve this problem.

  • Check the fan switch on your thermostat. If it is set to "Manual" or "On," change the setting to "Auto." If the blower fan does not shut off, the burner is likely still lit. Do not turn off the blower if the burners are still lit.

  • Turn down the temperature on your thermostat if the blower fan is still running. Turn off your furnace at the thermostat. Wait a few minutes for the burners to shut off, followed by the blower fan.

  • Locate your furnace's circuit breakers if the burners shut off and the blower fan keeps running. The circuit breakers are usually located inside an electrical panel next to the outdoor heat pump. Once you locate the circuit breakers, push them to the "Off" position. If you see a main on/off switch, push it to the "Off" position.

  • Press the gas shut-off switch next to your furnace to turn off the gas. If your blower fan is still not turning off, your furnace may have a damaged gas valve or thermostat that requires professional repair. Contact a qualified technician for additional troubleshooting and repair.

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