When do you need to replace a blower motor switch?
When do you need to replace a blower motor switch?
If your blower motor switch only works on certain settings, gets stuck, or has a broken knob, you may need to replace your blower motor switch. 1. Switch only works on certain settings 2. Switch is stuck 3. Broken knob Average rating from 53 customers who received a Heating AC Inspection.
What happens when you change the fuse on a blower?
If the blower works when you change the fuse, you may not be out of the woods yet. When the motor gets old and tired it will draw more current through the wires than a new motor.
What causes a bad blower motor switch to jam?
If the switch or any of its contacts becomes damaged, this may cause the switch to jam, or get stuck when you trying to change the setting. In some cases, the switch may completely seize into one position, which will lock the AC into place. 3. Broken knob A symptom that is a bit more obvious is a broken knob.
What does the blower motor on a car do?
The blower motor is the electrical switch on the interior of a vehicle that allows the driver to control the vehicle’s heating and air conditioning system.
When to replace a heater blower motor switch or relay?
When the motor gets old and tired it will draw more current through the wires than a new motor. It may still draw enough current to blow the fuse after it runs for a while. In that case, a motor replacement is in order. Step 1: Disconnect the battery. Put on your safety glasses and disconnect the battery at the negative cable.
If the blower works when you change the fuse, you may not be out of the woods yet. When the motor gets old and tired it will draw more current through the wires than a new motor.
What are the signs of a broken blower motor switch?
Some common signs of a broken blower motor switch are if the switch only works on certain air settings, which occurs when a contact wears out, or if the switch is stuck or often gets stuck, indicating that the switch is not working properly.
What should the voltage be on a blower motor?
If those are OK than backprobe the blower motor connector and check for power on terminal 1. Check terminal 2 for a variable voltage, this should be 12v with the fan control knob on off and 5v or full ground on full. If that checks out replace the blower motor.
