Sub Zero freezer 1st had ice build up, so I replaced defrost timer.. Ran for a while (2-3 weeks), then wouldn't stay cold, everything would be defrosted randomly, fan wasn't running so I thought ez, and replaced fan switch. Well worked for a day or 2, but still doesn't seem to want to get/stay cold. It will work for a while (half a day or so). Then the fan doesn't work and compressor doesn't turn on. It stays chilly but not cold. I have to turn the thermostat all the way down to 10 to get the compressor & fan to kick on, then roll it back to 5. Not sure wher to look or how to test... Thermostat? Comp Relay? Control knob? thanks guys.. Sub Zero 590.
Edited by timgiles, 24 May 2013 - 10:00 PM.