jerryjay11
Well-known member
People, If the capacitor is bad the compressor will not run as the OP stated it does. Instead the compressor would make a buzzing sound and a click as it is trying to start. Next time your home refrigerator is running, try unplugging and immediately plugging it back in and your will hear this. Some newer electronic controlled fridges have a built-in delay to prevent this, so this won't work on them. The click is the overload device opening because of the high amperage when attempting to start. There are three devices on a capacitor start compressor...Start Capacitor, Start Relay, and Overload device. The start relay puts the start winding in parallel with the run winding on initial start until the amperage drops low enough as the motor gets near full speed. When the Start winding drops out the compressor is running only on the run winding at a lower amperage. Now even if you had a compressor that utilized a run capacitor, if the compactor is defective the compressor would trip from high amperage via the overload device. It would not run as the OP stated it does. The start winding is only in the circuit for less than a second to overcome the initial torque required to rotate the compressor and pump the refrigerant.
So replacing a capacitor, relay, or overload isn't going to fix a compressor that is running and not cooling. Either there is a sealed system leak or the reed valves in the compressor are shot. I have 39 years experience in the HVAC/R field and still doing it as a hobby.
So replacing a capacitor, relay, or overload isn't going to fix a compressor that is running and not cooling. Either there is a sealed system leak or the reed valves in the compressor are shot. I have 39 years experience in the HVAC/R field and still doing it as a hobby.