How do you test a fan motor power?
As you probably know, fan motors can be designed for several different purposes….Test the first set of wires:
- Take your multimeter and set it to ohms.
- Take the black multimeter standard test lead and touch the white wire with it.
- Touch and continue touching the white – brown wire with the red multimeter probe.
How many ohms should a DC motor?
You should receive an immediate reading in ohms of approximately 10 to 100 ohms on the meter. This wide range takes into account for the carbon brush connection to the rotor windings. Rotate the motor shaft very slowly in either direction.
How can you tell if a DC motor is bad?
Touch the leads of the meter to the two motor leads. The meter should read a low resistance in the area from 10 to 30 ohms. If the meter reads an infinite ohms reading or an open circuit, rotate the end shaft of the motor. The meter should give various ohm readings as the motor shaft is rotated.
What happens when you test a fan motor?
Always visually check the capacitor before you start testing because ruptured capacitors and capacitors with dents or any other types of deformities are obviously broken and you need to replace them as soon as possible. It goes without saying that everything is probably fine with the fan motor if you detect such a capacitor.
What causes a fan motor to go bad?
One more thing before you start testing. The top cause of fan motor ‘breakdowns’ is a bad run capacitor. Always visually check the capacitor before you start testing because ruptured capacitors and capacitors with dents or any other types of deformities are obviously broken and you need to replace them as soon as possible.
What are the wires on a fan motor?
Fan motors usually have two wires; brown and white – brown wires that are plugged into the capacitor. Other two wires are black and white and they are to be plugged into the capacitor. We will test the wires according to their functions.
How can you tell if an evaporator fan is going bad?
Listen for a squeal or chirp sound. If the evaporator fan motor is going bad, it may still run while making a high pitched sound that may come and go. If you hear that sort of sound, something may be caught in the fan blades or the motor may be dying.
Always visually check the capacitor before you start testing because ruptured capacitors and capacitors with dents or any other types of deformities are obviously broken and you need to replace them as soon as possible. It goes without saying that everything is probably fine with the fan motor if you detect such a capacitor.
One more thing before you start testing. The top cause of fan motor ‘breakdowns’ is a bad run capacitor. Always visually check the capacitor before you start testing because ruptured capacitors and capacitors with dents or any other types of deformities are obviously broken and you need to replace them as soon as possible.
What causes a bad or failing blower motor relay?
Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current…
Fan motors usually have two wires; brown and white – brown wires that are plugged into the capacitor. Other two wires are black and white and they are to be plugged into the capacitor. We will test the wires according to their functions.