How long does it take to replace fan motor?
This is around a 4 hour job by an experienced Tech. At home, by a Novice with decent skills, about 5 hours plus!
How do you replace a motor resistor?
Difficulty
- Remove the negative battery terminal.
- Locate the blower motor resistor on the passenger side under the dash board.
- Disconnect the electrical connector to the blower motor resistor.
- Remove the screws or bolts to the blower motor resistor and remove the resistor.
- Installation is the reverse of the removal.
How long does a blower motor resistor last?
Blower motor resistors aren’t a maintenance item — they don’t have a set replacement schedule. They can last the life of a vehicle, and age can be a factor as the plastic can become brittle over time, or heat may cause electronic failure. The amount of use a blower motor receives may also be a factor.
Where is the resistor on an air conditioner fan?
The air conditioning and heating controls allow you to switch fan speeds — and the blower motor resistor controls that speed once you select it. The resistor is between the power source and the fan, and allows only the desired amount of power to go to the fan.
What causes a blower motor resistor to overheat?
Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor. For example, this happens when the fan blade is jammed by a foreign object or when the motor bearings are worn out and it doesn’t spin freely.
What are the symptoms of a worn out blower motor?
One of the symptoms of a worn out blower motor is that it can intermittently produce a loud screeching noise when running. How to test a blower motor? If the blower motor doesn’t work at all, the blower motor itself must be tested first. Typically it’s done by measuring the voltage at the blower motor connector when it’s turned on.