Question about Sub-Zero 642

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Freezer not working on sub-zero 642 model

Lights are working and fan appears to be working
no alarm has been sounded
cleaned coils
refrigerator is working

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Remove the top grille and touch the compressor on the left, above the freezer. Is it warm, can you feel it vibrating? If not, your compressor may need to be replaced.

Posted on May 25, 2009

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Posted on Jan 02, 2017

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1 Answer

Sub Zero 642 side by side, refrigerator side not working.


If the refrigerator compressor runs and cools when you use the manual activation mode but does not run normally then the control board would be what I would suspect. If it has the manual activation then it is new enough to give error codes. If it is not running and not recognizing it's not running, something is wrong with the control. Unless you are seeing two dashes in the refr display. That would mean the refr section was disabled.

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Freezer not working/but fan is running


The freezer side may be icing up. Soon enough the fridge side may have problems, too. Love those Sub-Zeros, but if the defrost timer fails, it will ice up. Defrost timer is up top. A generic one will do.

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My sub zero service light and EC 24 are flashing, fridge is getting warmer...suggestions?


The ec 24 alarm is from a sensor that is located behind the freezer wall and connects to the control board in the ref. When the temp gets to a certain point the sensor will trip giving the alarm. If the temperature in the freezer is gone up but is around the 20 -30 degree F range, I would remove the grate that covers the compressor and check to see if the fan is running and if the coils are dirty. Either one of those can cause temps to go up. If the fan is running and the coils are clean, Call a service company because you possibly have a sealed system issue

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1 Answer

LCD panel and lights not working


On your Sub-Zero 642 Your display will not work unless your refrigerator lights work.
1st. Make sure your light bulbs are good.
2nd. Check your refrigerator door light switch.
3rd. The subzero uses a thermal overload to kill your lights if the door is left open to long.
http://www.on-timeappliance.com/subzero.html

Mar 26, 2012 | Sub-Zero 642

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My sub-zero 642 will not get colder in the freezer than about 9 degrees and the fridge won't get colder than about 45 degrees. I turned off the breaker and vacuumed the coils, but still no change. ...


The Sub Zero 642 uses independent refrigeration meaning the freezer and refrigerator each has their own system. Best to have an "Authorized Factory Service Company" check it out.

Jun 08, 2011 | Refrigerators

1 Answer

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ck the cond coil and if dirty cclean it and make sure the fan on the coil is workiign / if this does not correct problem change the tempt control .. mm .. do the general mantaince first then look for the tuff stuff. mm

Jul 22, 2010 | Sub-Zero 642

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It is your evaporator fan. When the door opens power is cut to the fan motor.

Apr 29, 2010 | Sub-Zero 642

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Fixing Freon Leak by replacing evaporator coil on Sub Zero refrigerator

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Sub Zero 642 started humming when the compressor turns on


check your evaporator and, condenser fans and, lube them with machine oil one of the back ones is stuck
I would never get rid of my Sub Zero they are the best made and, I service all makes of refrigerators good for you; buying the best!

Apr 30, 2009 | Sub-Zero 642

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