Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

4 Answers

Sub-zero 650 vacuum condenser light keeps comming on

Vacuum condenser light is on
turn unit off / unplug power... light resets
comes back on within 24 hrs

condenser is clean
condenser fan is running

freezer compressor is ok , runs very little to hold 0

frig compressor runs alot more than it used to to hold temp at 38

i've got a set of a/c gages, freon pressure at service port on compressor is 0 psi when unit is running. when unit is off pressure goes up to 35 psi

ive got some r134a freon i can add, what should pressures be ?

diag values

r - 38
re - 40


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  • Anonymous Aug 07, 2008

    My sub zero 642 "vacuum condenser" light is flashing.  I vacuum the unit regularly.  The condenser is clean but the refrigerator side was 52 on my thermometer.  What can I do?


  • fclaessens Sep 20, 2008

    We have exactly the same problems but our is a Model 690. How do we fix it?

  • edwardbloom
    edwardbloom Jan 15, 2013

    Sub Zero has a very big problem with junk evaporator coils or the fridge side. You need an evap coil most likely. SubZero= overpriced junk

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Turn the refrigerator off for a minute to reset the vaccum condenser light.

Posted on Oct 24, 2008

  • edwardbloom
    edwardbloom Jan 15, 2013

    If the condensor is clean, and you did reset the board by turning off then on, then you have a bad evaportator coil. SubZero have junk evap coils

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Here's the answer, from an official Sub Zero repair company in NYC: Try this: either pull out the plug for the Sub Zero refrigerator or turn off the circuit breaker (or fuse) in your house that leads to it, wait for some minutes and then turn back on. It is NOT enough to turn off the unit using its own internal on-off switch - it has to be totally disconnected from the AC. I did so, waited 15 minutes, turned back on, and it worked!! I had vacuumed the condenser grill twice but the "vacuum condenser" light kept flashing AND the refrig would go bonkers if set below 38. Now the flashing warning is off and it's down to 35. Great !!!

Posted on Oct 30, 2011

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1st is the Condensrer clean?? if so has the light been reset ??? need to know how ask... the pressures will vary depending on the coil temps if you reset the light and it comes back within a day or two and the coil is clean.. It is a long run time error given from the compressor

Posted on Jan 29, 2008

How do you reset vacume cond. light on the model 650?

Posted on Feb 06, 2008

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