Question about Sub-Zero 642
Fridge side working fine freezer side not working--fan is working but unit is not cooling at all no service light flashing--that seems odd
The freezer side may be icing up. Soon enough the fridge side may have problems, too. Love those Sub-Zeros, but if the defrost timer fails, it will ice up. Defrost timer is up top. A generic one will do.
Posted on Nov 26, 2013
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Posted on Jan 02, 2017
SOURCE: sub-zero 650 / bottom freezer
Clean fluff from condensor, turn off overnight and defrost, turn back on following day should start to work ok within 24hrs. Regards Advisor
Posted on Aug 23, 2007
Rhino, this is yet another simple fix. You need to call subzero and let them know that your ref section is not cooling properly. 9 out of 10 times it will be a problem with the evaporator coil needing replacement. Sub is aware of this issue and usually picks up the tab for this repair.
Posted on Mar 31, 2008
If you replace the fan and clean the coils, and the refrigerator STILL does not cool, then contact SubZero or a service provider for an evaporator coil replacement. Units manufacturer before mid-2003 had copper+aluminum coils that would corrode and allow all of the coolant to escape. The (should be warranty) replacement is all aluminum.
Note the freezer does not have this issue due to the lack of liquid water.
Posted on May 12, 2008
This is a Sub Zero and many technicians do not realize that these units most all run on 2 separate systems. 2 cold controls 2 compressors 2 evaporators. They share a condenser and condenser fan motor. What you are describing is most likely a bad cold control. It is pretty common for these to get some age and go bad. If you are very savvy with repairs yourself then if you access the compressor area and feel that the compressor on the right is cool and the compressor on the left is warm then you know that the ref. compressor has not been running. UNPLUG THE UNIT OR CUT THE BREAKER OFF. Remove the shelving from the fresh food section and the cover to the lights and the panel below the lights and lean the back panel forward to access the cold control. You will see 3 wires to the cold control. The green wire is the ground wire of corse. Unplug the other 2 wires remembering their location on the control unit. Take a jumper wire and jump these 2 wires. If when you power the unit up the right side compressor comes on then you know that your fresh food cold control is bad. Replace fresh food cold control.
Posted on Apr 11, 2009
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