Question about Sub-Zero 661/F Side by Side Refrigerator

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My sub-zero refrigorator is icing up on the first

My sub-zero refrigerator is icing up on the first 2 shelfs. I was told that it was becaues there was a pin hole in the coial and freon was leaking. That does not make sense to me because the setting is on 3. If freon was leaking wouldn't the unit be warm?

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There could be some other reasons for the ice.
1 bad or cracked door seal,have a look at the door seals.
2 Defrost timer may need to be set longer.
3 T sat set to low or not working properly.

Unit may be low on freon also,causing a lower pressure which would cause a lower tempreture,this occurs with a small leak or a pin hole leak.Once enough freon leaks out it will warm up and no longer work.

You can have a leak check done by a service person.

Posted on May 13, 2010

Testimonial: "I was very happy to get such a quick response. I may have not explaned the problem correctly but I did get half the answer. My problem is the refirgorator is to cold and is freezing up on 2 shelfs. I had an appliance company tell me it was leaking freon. How could it be to cold if it is leaking freon?"

  • mpcheesman1
    mpcheesman1 May 13, 2010

    Its hard to explain.

    But here goes,Freon in a refrig system is under pressure.Both low and high pressure.

    At a given low pressure, freon will absorb heat from an area to be cooled.This pressure must remain the same to have the freon work or to maintain a given temperature.If you loose freon due to a leak the pressure will be lowe rd resulting in a lower temperature creating ice.Eventually if enough freon leaks out there will be no pressure and no temperature making the refig warm,this depends on the size of the leak.

    Each refrigerator or freezer or home air conditioner is prebuilt and preset for a certain operating pressure.

    Say a refrig with r12 or freon type 12 runs at 32 psig will give a temp of say 35 to 40 degrees f


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