Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

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650/5 Hello, My Sub Zero temperature is erratic. The freezer is fine but the fridge is hovering between 40 and 48. I have the temp set at 35. Any ideas would be helpful.  Thank you in advance.

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  • Anonymous Jul 07, 2008

    700 series sub, bottom freezer, my problem exactly as described by trsieg. cleaned condenser, which was dirty, tried off/on restart, all as suggested by manual, but temp in frig section still varies between 42/48 despite being set at 36.

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  • 481 Answers

Sounds like a defrost problem. Check to see if there is any frost buildup in the back wall of the freezer. If so, it is not defrosting as it should.

  • possible causes:
  1. bad defrost timer
  2. bad defrost heater (in freezer)
  3. bad thermo switch in freezer
If you don’t know what these are then unplug the machine and let the ice melt in the freezer overnight with the door open. Then try it the next day, if is cooling fine then you need to have a service person replace one of the above items.

Posted on Jul 06, 2008

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