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

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Sub zero refrig - ice forming inside

I have a 8 year old side by side sub zero refrigerator and ice is forming on the back left hand side of the refrigerator, what is causing this?

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  • alnak117 Oct 12, 2008

    Thank you very much, so I guess I have to call a Sub Zero repairman, doesn't sound like a DIY fix.

  • fabinfam Jan 30, 2009

    I have the same problem with a Sub Zero 561. Just had the refrig "sealed system" replaced under warranty (bought a house that had this refrig included and the frig side wasn't working at all) - the parts were covered, but I still had to pay $550 in labor.... Anyway, now the evaporator coils frost up. After the initial fix, I heard a boiling sound coming from the coils. I've taken the rear panel out of the refrig box and have exposed the back of the thermostat. Can someone further explain where the heating element is so I can check the resistance? Also, is there an easy way to check the thermostat functionality?
    Thanks - Dan

  • Anonymous Apr 30, 2009

    I just had my 19 year old Sub Zero 532 repaired due to ice forming on the left side of fridge compartment. The Evaporator and the Dryer was replaced. Due to the age of the unit the freon had to be replaced with the new coolant. The ice formation was due to a leak. Cost of the repair and parts $800.00
    Wheelshot was right on

  • Marat Brikov Mar 29, 2014

    https://www.youtube.com/watch?v=B-jwyofT...

  • Marat Brikov Mar 29, 2014

    This is video how to fix this problem, its common problem with all sub zero models (side by side, or any other) and happens usualy on fresh food section. I have video of how I fix it on my channel, it was sub zero 600 series bottom freezer, but side by side will be exact fix link is below

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The solution posted previously is TOTALLY WRONG. A Sub Zero ref doesn't have a heating element in the fresh food section. Only in the Frozen food section. It has 2 totally separate systems for each section. 2 Compressors and 2 evaporators. They share a condenser. If you are having ice build up in the refrigerator then the problem you are having is a refrigerant leak in the fresh food evaporator. You need to have a certified tech come out and replace the evaporator in your refrigerator section of your Sub Zero. Not sure what you are asking about the thermostat.

Posted on Apr 11, 2009

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There is no heater in the fresh food section of sub zero. If you have frost or ice build up on the left of back wall, your sealed system failed, low on refrigerant, sub zero known for weak evaporator coils in fridge section. Here is how I fix it, check this video, put like or dislike on it, thanks ! THIS IS 100% What is wrong if you asking about refrigerator section!

Posted on Apr 17, 2014

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HI This component is a heating element located on the evaporator coil. When the refrigerator or freezer switches to the defrost cycle, the defrost heater is turned on to melt the frost in the compartment. Failure of the defrost heater causes failure to defrost.Test the element with a VOM set to the RX1 scale. To gain access to the heating element, remove the compartment's wall panels. Clip one probe of the VOM to each element terminal. The meter should read between 5 and 20 ohms. If it doesn't, the heating element is faulty and should be replaced. Replace the heater with a new one of the same type and electrical rating. Connect the new heater the same way the old one was connected.

Posted on Oct 12, 2008

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I need new shelves for my 48" ref. side by side

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