This customer had two problems.
Temps were fluctuating up and down and intermittently there was a loud whirring sound in the freezer.
I replaced the computer and sensors and that seems to have handled the temps, but the loud sound is still going on in the freezer.
I have not heard it when I was there, but the tenant told the landlord it's still happening.
I'm suspecting the evap fan motor is being told to go into high speed and it can't handle it.
Changing the fan motor should handle that.
Any differing opinions??