Auto Repair Encyclopedia
Heater Blower Motor Replacement
Sometimes referred to as Heater Blower, Replace Heater Blower, Heater Blower Replace, Blower, Blower Replace, Replace Blower, Blower Moter, Replace Blower Motor, Blower Motor Replace
The heater blower motor is located behind the dashboard. The driver can control the speed at which the blower motor operates via buttons, slides, or dials on the dashboard. The blower motor forces air through a heater radiator behind the dashboard to provide heat for the passenger compartment. Alternatively, the motor blows air through the air conditioning evaporator to provide cold air to the passenger compartment.
Heater motors on many vehicles may operate only at high speeds if the heater control resistor unit fails. Mice may also build nests in the heater blower fan, filling it with nesting material that can cause the fan to jam or malfunction.
To access and replace the blower motor, some disassembly of the dashboard and interior trim is necessary.
About this Repair: Heater Blower Motor Replacement
What to watch out for
If you can hear the blower motor operating, but cannot feel air flow from the vents, there is a problem with the airflow controls and not the blower motor.
Why this happens
Heater blower motors can be damaged by fluid leaking from a heater core or evaporator. Any fluid leaks near the heater blower need to be resolved or the new heater blower will be ruined.
After the repair, the heater motor should run normally at all speeds and in all modes, such as defrost, heat, etc. The new motor should be quiet and not vibrate.
