Refrigerator Compressor Not Running? How to Find the Cause
When the refrigerator compressor is not running, the unit never cools and the cabinet warms up. Usually, the start relay, the cold control, or the control board is at fault. First, confirm the unit has power. Then, work through the start components below.
Parts to inspect for a refrigerator compressor not running problem
1. Overload Or Relay-Start Capacitor
The start relay and overload give the compressor the boost it needs to start and protect it from overheating. When the relay fails, the compressor hums but will not run. Therefore, test the relay and overload for continuity. Replace them if they read open or rattle.
2. Cold Control & Temperature Control
The cold control is the thermostat that starts and stops the compressor to keep the cabinet cold. If it fails, the unit may stay dead or never reach temperature. Therefore, test the control for continuity as you turn the dial. Replace it if the contacts do not close.
3. Electronic Control Board
The electronic control board is the brain that runs cooling, defrost, and the fans. When it fails, several functions can act up at once. Therefore, inspect the board for burnt spots or bad relays, and confirm it sends power to the parts it controls. Replace the board if it no longer responds.
Get the parts
We supply OEM and replacement parts in bulk. Browse the Appliance Parts catalog, or request a bulk quote for volume orders.
Is the unit old or failing often? A new ENERGY STAR certified refrigerator can cut energy use, so weigh a repair against a replacement.
Most of the time, a refrigerator compressor not running problem traces back to one worn part. So replace it, then run the unit and confirm the fix.