Question about Sub-Zero 601R

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Sub-zero Fridge not cooling and ice forming

I have an 8 year old Sub-zero (all refrigerator). The unit will not get below 48 degrees and always reads "vacuum condensor". I clean the condensor frequently but message never goes away. When I removed the back panel on the fridge, the top left corner of the coils are frozen in ice. I tried defrosting but iced formed up again. The last repairman that came out simply defrosted the ice and had no real clue on the potential problem. Any help would be appreciated.

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  • Crash350 Jun 01, 2008

    can the refrigerant be filled? Is it possible that there is a leak in the refrigerant line and, if so, how would you find the leak?

  • SHAI L Jun 09, 2008

    I have an 10 years old Sub-zero (all refrigerator). The unit will not get below 48 degrees and always reads "vacuum condensor". I clean the condensor frequently but message never goes away.

  • kstall Jun 18, 2008

    Mine is doing the same thing, the condensate inside the back wall, the temperature won't go down, but the compressor won't come on. I've looked at the card and see no hot spots, I've looked at the compressor switch and don't see anything wrong there. All the fans seem to be working normal, the drain hose is not plugged. It's seems like there is a switch that has gilflirted and has everything locked down.

  • James Helmer
    James Helmer May 11, 2010

    Your system may be low on refrigerant. The vacuum condenser is a signal that discharge temperatures from the compressor have exceeded the set point for the warning. that repair man who didn't have a clue, did he check system internal pressures? Frost should form evenly over the entire evaporator and not just at one corner.

  • Mart Hyatt Dec 25, 2012

    I have a Sub Zero model 542 built date jan 1998. It has been having trouble for 5 years and two service calls for the Fidge is not cooling, but the freezer works fine.



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You do have a leak and it will be in the evaporator. So call a factory authorized company and have it replaced.The warranty of a Sub Zero sealed system is full parts and labor for years 1-5 and parts only in year 6-12. Sub Zero expects a lot of their service companies so it behooves you to call one. To find an authorized company go to or call 800-222-7820

Posted on Jan 08, 2009

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The leak in the system can be located by a number of methods. First I would look for a slight sign of oil at the point of the leak. 10% of the compressor oil circulates with the refrigerant. Although the refrigerant will leak out as a colorless, odorless gas and be invisible to sight it will leave an oil trace. Electronic leak detectors can detect leaks as small as .5 ounce per year. If the leak is large enough it can be detected with simple soap and water which will form bubbles at the leak point.

Posted on Jun 01, 2008


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