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  1. #1
    Join Date
    Nov 2012
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    india
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    temperature higher than set temp(-80c) at the bottom of freezer



    Dear All,
    I am newbie to refrigeration the cooling at the bottom of deep freezer is higher than set temperature (-80C ) diffrence between set and actual temperature is 10 to 15C. Freezer temp. sensor is at middle section of freezer Can anyone give me idea why such high temperature diffrence is ?
    Thanks & Regards,
    bhushan



  2. #2
    Join Date
    Feb 2007
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    UK
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    Re: temperature higher than set temp(-80c) at the bottom of freezer

    That temperature difference exists because your freezer is not working as intended.


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  3. #3
    Join Date
    Nov 2012
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    Re: temperature higher than set temp(-80c) at the bottom of freezer

    Same problem for mostly for all deep freezer of different customer.

  4. #4
    Join Date
    Sep 2008
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    Canada
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    Re: temperature higher than set temp(-80c) at the bottom of freezer

    What is the size of the freezer? What refrigerant do you use?

  5. #5
    Join Date
    Nov 2008
    Location
    australia
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    Re: temperature higher than set temp(-80c) at the bottom of freezer

    hello ,is the compressors located below the freezer if so you will have heat from compressors etc effecting lower area of freezer ,,try loading up freezer with product will reduce temps but middle/display sensor will always read lower

  6. #6
    Join Date
    Mar 2005
    Location
    New Zealand
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    Re: temperature higher than set temp(-80c) at the bottom of freezer

    Need more information, what brand of 'ultra low temp freezer' is it? What are you using it for and how often is the door open? Is there heavy ice build up inside the freezer? If so, relocate whatever is inside, defrost the freezer and restart. With heavy ice build up, oil logging is common with ULT freezers, this will cause poor performance

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