FAQ: Furnace Blower Not Running

A furnace blower not running is cause for furnace repair. Without a properly functioning blower motor, the furnace will not be able to circulate warmed air into the home.
 

Troubleshooting Furnace Blower Not Running

  • Make sure the thermostat is set properly to trigger the furnace to initiate and the blower to run. Heat mode should be selected and the temperature set several degrees higher than the current room temperature. Make sure programmed settings are accurate. Replace batteries and check that the thermostat is powered.
  • Make sure the furnace has power. If a breaker is tripped, reset; replace blown fuses. Check the on/off switch at the furnace and air handler to ensure it was not accidentally turned off.
  • Replace the dirty air filter with a clean one. A clogged filter restricts airflow, making your unit overheat and your blower will stop working.

 

Causes of Furnace Blower Not Running

If the troubleshooting steps above did not solve the issue of your furnace blower not running, these issues may be present, requiring professional furnace repair.

  • Malfunctioning blower fan
  • Faulty thermostat
  • Broken limit control switch
  • Heating coils malfunctioning
  • Voltage issues, electrical failure
  • Bad capacitor
  • Worn bearings