Customer put a standalone thermometer in refrigerator section. Temperature goes from 50 to 37 degrees. Is this normal or does the main PCB need to be replaced.

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What have you tried so far?

Have replaced compressor


If the compressor was replaced recently, I would make sure it has a proper refrigerant charge. If it does a few more things can cause fluctuating temperatures.
1) Make sure the doors are closing properly and have good seals.
2) Make sure the interior lights are not staying on when the door is closed. You can have a bad door switch or sometimes a hinge cam riser that will not close the door switch and leave the light on.
3) Check for stored error codes in section 6-1 in the service manual link below. Follow troubleshooting guide on additional diagnostics.

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