Why does my fan go fast then slow?
The torque to drive the motor of your electric fan comes from the magnetic field induced in the motor coils when electricity passes through the coils. When the fan slows down and stops, it could simply be because the coils are worn out, but it’s often a burned-out capacitor.
Why does my fan change speeds by itself?
The reason a ceiling fan is spinning slowly is almost always the result of dirty or damaged ball bearings. Even at the top speed setting, with enough friction, the fan blades move slowly or not at all, and the motor may even burn itself out.
What happens if capacitor fails in fan?
If the capacitor is bad, the fan is still getting power, but because the start coil is compromised, it can’t develop enough torque to start the fan. You can start the fan yourself, however, by giving it a push, and it will keep running. A bad capacitor can also make the fan function erratically.
How do you slow down a fan motor?
With a Shaded Pole motor, you can simply reduce the voltage, say with a light dimmer and the motor produces less torque, then with less torque the air friction on the fan blades causes it to slow down, which in turn moves less air.
Why is my ceiling fan not turning?
If your ceiling fan stopped working or is not turning on, it could be because it isn’t receiving any electricity. This could be because the circuit breaker has tripped or is off. Your ceiling fan could also stop working due to internal defects namely shot ball bearings or an overheated motor.
Can you adjust the speed of a ceiling fan?
Check the pull chain switch on the fan. A bad switch, or missing speed setting, will cause the fan to run slowly. Turn the fan off and allow it to stop moving. Pull the chain and turn the fan on the lowest setting, then listen to the fan motor as you pull the chain and move through the progressive speed settings.
What happens if fan capacitor fails?
Why is my fan running at high speed?
A fan running at high speed means the computer is running hot and trying to cool itself down. It could be unable to because of clogged air vents or failing fans. It could be legitimate if the computer is actually working on something CPU-intensive.
Why does my floor fan not turn on?
If you turn on your fan and the fan motor hums even though the fan blades won’t move, the cause may be that the gears are stuck. Once you’ve cleaned the fan as outlined in the previous step, try unscrewing the motor housing so you can see the electric motor 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.
When do you Know Your AC fan motor is bad?
If the compressor is working but the fan blades are not spinning, the motor is faulty. That’s your cue to turn the system off and call the pros to repair the AC fan motor. Replacing an HVAC motor is a job that can be done quickly once the problem is identified.