You can perform the compressor test as follows:
Resistance test
1. Disconnect power to unit.
2. Discharge capacitor by shorting across terminals with a resistor for 1 minute.
NOTE: (Some compressors do not have a run capacitor.)
3. Remove leads from compressor terminals.
4. Set ohmmeter to lowest scale.
5. Check for resistance between
Terminals “S” and “C”, start winding
Terminals “R” and “C”, run winding
If either compressor winding reads open (infinite or very high resistance) or
dead short (0 ohms), replace compressor.
Ground test
1. Disconnect power to refrigerator.
2. Discharge capacitor, if present, by shorting terminals through a resistor.
3. Remove compressor leads and use an ohmmeter set on highest scale.
4. Touch one lead to compressor body (clean point of contact) and other probe to each compressor terminal.
If reading is obtained, compressor is grounded and must be replaced.
If both tests are fine - the compressor electrically is good. Most likely the problem is a bad start components.
- The start relay
Part number: AP3796508