Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

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Sub-Zero 650/F The refrigerator is not cooling fully. It will hold about 50 degrees, maybe 47 if your lucky. The freezed appears to be OK. Funny thing, the control panel for the refrigerator appears to be working backwards. When you hit cooler it displays a higher temperture and vice versa. I thought the micro controller was confused due to recent power blips so I shut the unit down completely at the circuit breaker. That did not remedy the problem. I also checked it with a digital thermometer to make sure the internal display was OK. It was within a degree or two. The other funny thing is the compressor seems to cycle off thinking its satisfied the temperature. I have not checked the fans yet. Ed at [email protected] or [email protected]

Posted by ETLABS on

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  • ETLABS Oct 26, 2007

    Thanks for the tips, the Re value is 48 so it looks like the evap is bad.  I've called for service and they are going to come and confirm.  Sub-Zero said that if it's the evap they'll cover it -- THANKS.  I still don't know why the refrig controls work backwards  - "warmer causes temp to go down" and "colder causes the temp to go up" but I'll have that checked at the same time.  I'll let you know the final results.  Much appreciated.

  • MNelson Apr 01, 2008

    Our refigerator is about 10 years old. It is not keeping cold. It's a side by side. The freezer appears to be working properly. I have turned the knob that regulates the cooling from 5 to 7 and now to 9. Nothing seems to work. Do you have some suggestions?

  • MikeMull May 19, 2008

    Sub Zero 650 freezer srction ok but refrigerator wont get cool - sounds like Refrigerator Evaporator may be the problem to be diagnosed. Where do I contact Sub-Sero in Calgary Canada. Mike 403-271-1867



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Douglas Henry

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Get into diagnostic mode by pressing and holding either colder key, then pressing on/off. You can use the colder key to scroll through 5 reading labeled fe, re, f, and r  look at the re temp. is it higher than 38? if it is you probably have a freon leak in the evaporater refridgerator (call sub zero...they will completely pay for this issue, even past the 5 year warranty)  If the temp reads really low (like 10 on re or something) you probably have a bad fan or fan switch in the fridge portion. this unit has seperate compressors and freon for the fridge and freezer..hence the lack of problems in the freezer. hope this helps!

Posted on Oct 24, 2007



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Looks good what are all the definitions of fe, re, f, r, and ? (you said there are five. How do we return to normal operation? I don't want to wind up in 'showroom' or 'sabbath' modes.

Posted on Jan 03, 2008


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