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Thread: SubZero 685 Evaporator

  1. #1
    Join Date
    Jan 2012
    Location
    michigan
    Posts
    2

    Default SubZero 685 Evaporator

    Model Number: 685
    Brand: Sub Zero
    Age: 1-5 years

    I do have a specific question regarding the evaporator for the SubZero refrigerators:
    During the 2004-2005 Sub-Zero moved awayd from the aluminum tubing used to make the evaporators to copper. The evaporators made starting 2004 where made using copper tubing and aluminum for fins.
    However the refrigerant R134a made by DuPont under the tradename of Suva 134a reacts with the moisture. The moisture reacts with the carbon in Suva to form Carbonic Acid which creates little holes in the copper tubibg thus falling the closed loop system.

    Today, I had my evaporator replaced under warranty (I still paid $700 for labor). The new evaporator is all made of aluminum (tubes and fins). The only copper parts are two small tubes used to solder the evaporator to the copper lines of the refrigerator. The new evaporator was painted black.

    The question I have is: will the new evaporator last for 12 years without being attacked by Suva 134a? Is the material change made by Sub-Zero for real (meaning performance) or just for cost reduction due to the high copper pricing?

  2. #2
    Join Date
    Oct 2004
    Location
    Ontario, Canada
    Posts
    21,506

    Default

    Hi,

    Lots of evaporator leaks....prior to 2004-2005 as well.

    Is the material change made by Sub-Zero for real (meaning performance) or just for cost reduction due to the high copper pricing?
    Both, suppose to be an improvement and probably is more cost effective at the same time. So far any ones that *I* have done have not reoccured

    JMO!

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid
    Yeah I've got O.C.D.....Old, Cranky and Dangerous.

  3. #3
    Join Date
    Jan 2012
    Location
    michigan
    Posts
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    Default

    Jeff,
    How long ago did you replaced the copper evaporator with the one made of aluminum?
    Pat

  4. #4
    Join Date
    Oct 2004
    Location
    Ontario, Canada
    Posts
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    Default

    Approx 10 years or so now.

    Original ones had no paint/coating on them either.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid
    Yeah I've got O.C.D.....Old, Cranky and Dangerous.

  5. #5
    Join Date
    May 2012
    Location
    canada
    Posts
    3

    Default

    I have a problem . Where can I find the Evaporator. My fan is working but the freezer is fine but fridge heating up. subzero 685

    Thanks

  6. #6
    Join Date
    Oct 2004
    Location
    Ontario, Canada
    Posts
    21,506

    Default

    Hi,

    Normally behind the false back wall in the fresh food section.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid
    Yeah I've got O.C.D.....Old, Cranky and Dangerous.

  7. #7
    Join Date
    May 2012
    Location
    canada
    Posts
    3

    Default

    Thanks Jeff for the fast reply. How would I check if it is working properly. My condenser fan is working and freezer is cold but fridge is at 55.

    No subzero tech anywhere near where I live.

    Thanks

  8. #8
    Join Date
    Oct 2004
    Location
    Ontario, Canada
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    Default

    You may not 100% be able to without the correct equipment. Evaporator will frost/sweat for the cooling....on a system problem we often see a ball of ice only on the evaporator/cooling coils. Then we would switch and access the refrigeration system up at the compresors to help determine what is going on, leaker, inefficient compressor, ect.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid
    Yeah I've got O.C.D.....Old, Cranky and Dangerous.

  9. #9
    Join Date
    May 2012
    Location
    canada
    Posts
    3

    Default

    Hi Jeff

    I opened it up and the fan above does not seems to be working and I had some ice on the evaporator . Here is a link to a photo I took. View image: DSC00064

    I took away the ice but I guess there must be a leek of some sort do I need to replace this part.

    Thanks

  10. #10
    Join Date
    Oct 2004
    Location
    Ontario, Canada
    Posts
    21,506

    Default

    My fan is working but the freezer is fine but fridge heating up
    I opened it up and the fan above does not seems to be working
    Thought it was?

    Nice pic! That is a sign of a major system problem.....and yes a leaker would be the prime suspect!

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid
    Yeah I've got O.C.D.....Old, Cranky and Dangerous.

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