Furnace Blower Motor Troubleshooting: Furnace Blower Motor Noise The Capacitor In A Permanent Split Capacitor Psc Motor Indoor Blower Motor Troubleshooting How To Test A Furnace Blower Motor With A Multimeter HVAC Blower Motor Thermal Overload Help you determine if the furnace fan blower motor has failed or help you rule out its failure. This guide only covers Permanent Split Capacitor (PSC) Motors and does not provide information on troubleshooting ECM and variable speed motors.