The fan speed can be changed either by switching the blower resistor resistance mechanically, using a rotating lever, or electronically by the air conditioning system. The change in resistance then limits the current through the motor, which dictates the speed at which the blower fan works.
Likewise, people ask, what is the purpose of a blower motor resistor?
The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. It is responsible for controlling the blower motor's fan speed. A failed blower motor resistor can cause issues with the operation of the entire heating and air conditioning system.
What are the symptoms of a faulty cooling fan switch?
Several symptoms may point to a bad or failing thermo coolant fan switch.
- Engine overheating. Engines generate an enormous amount of heat and as a result are subjected to very large temperature swings if this switch does not operate effectively.
- Check Engine Light comes on.
- Broken or shorter signal wire.
How much is a fan resistor?
The average cost for a blower motor resistor replacement is between $83 and $150. Labor costs are estimated between $35 and $78 while parts are priced between $48 and $72. Estimate does not include taxes and fees.