Will a bad run capacitor prevent a motor from starting?
Considering this, will a motor start with a bad run capacitor?
There are also a number of symptoms that will tell you if the capacitor on a motor is faulty: A motor with a short-circuited capacitor often will start and run, but with less starting torque and lower full-load rpm than normal.
Subsequently, question is, why does a motor need a start capacitor? With a capacitor connected in series to the secondary winding, the magnetic field it produces lags behind the magnetic field generated by the primary winding. This difference in phases creates a starting torque and the motor starts to rotate. Capacitors that allow a motor to start rotating are called start capacitors.
Then, what causes a motor start capacitor to fail?
Many single-phase compressors require a start capacitor to assist in starting the motor. These capacitors will occasionally fail, causing a compressor to fail to start. Overheating is a primary cause of a failed start capacitor. If a start capacitor stays in the circuit too long, it will overheat and fail.
What happens if a run capacitor fails?
The most common problem that bad capacitors can cause is “hard starting.” This is when the compressor of an AC has difficulty starting up, stutters trying to turn on, and then shuts off a short while later. In most cases of capacitor problems, such as damage or a loss of charge, the capacitor will need to be replaced.