What makes a blower motor resistor go bad?
In most cases, a blower motor resistor fails due to corrosion or overheating. Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor.
What’s the problem with my blower motor fan speeds?
Probably a bad blower motor resistor you have there, or possibly a faulty blower motor or switch. The most common thing would be the resistor assembly, as that goes out more often than the other parts. A quick check with a test light can determine failure. No Heat In My 2000 Chevrolet Malibu – Blower Not…
How do you change the blower motor on a car?
Removal of the right side dash trim is usually all it takes to access the heater/blower area of the vehicle. A couple screws later and the resistor is out and unplugged from the blower motor. Installation of the new resistor is just as easy, and has a new harness that plugs into the existing blower motor. Now it gets just a tad more intricate.
Why is my Delta 88 heater fan not turning on?
My 1999 Olds Delta 88 heater fan switch turns blower on only occasionally and even then the high setting cuts off the fan (if it’s working). Probably a bad blower motor resistor you have there, or possibly a faulty blower motor or switch. The most common thing would be the resistor assembly, as that goes out more often than the other parts.
What causes an electric fan to slow down and stop?
The run capacitor stores charge and delays the current momentarily, which gives the fan rotor time to turn and orient itself so that the induced magnetic force is effective. When the capacitor burns out, the electric current through the coil is too steady to generate torque, and the fan slows down and stops.
What to do if your blower fan is not working?
Blower Motor Resistor Replacement – YouTube Blower fan not working – 2004-2014 Ford F-150 and other models. Blower Motor Resistor Replacement If playback doesn’t begin shortly, try restarting your device.
What causes a blower fan to turn faster?
The lower the resistance of the selected resistor in the pack, the higher the current that flows through the blower fan causing the fan to turn faster. The statements expressed above are only for informational purposes and should be independently verified.
How is a blower fan connected to a battery?
A blower fan is connected to the negative battery terminal (also called ground) on one end and to the positive battery terminal through a blower motor resistor on the other end. The blower resistor is connected in series to the blower fan motor.
Why is the resistor not working on my blower?
Hi There, The resistor is what controls the speed of the blower motor, not the relay. The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all.