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Subzero 632 freezer defrost problem


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6 replies to this topic

#1 asteroids

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Posted 09 November 2011 - 01:55 PM

It takes a few weeks but the evaporator completely ices over. Starting a manual defrost you can hear things happening but then things stop after a few minutes. I'm only reading about 3V AC at the heater.
Shouldn't it be 120V AC? Correct me if I'm wrong but there are only three things invovled here. The heater coil, the main controller, and the thermistor.

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#2 jumptrout

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Posted 09 November 2011 - 02:21 PM

Your defrost thermostat is probably bad. It is in line with one side of the heater. Some times they are puffed up on top. A continuity check of the terminator while cold will tell if it is bad. It should have continuity while cold.

#3 asteroids

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Posted 11 November 2011 - 02:24 PM

As far as I know my 632 only has a main logic board. If there's a thermostat, where is it?

The thermistor reads a few ohms short. Subzero couldn't spend a few extra buck and get
precision parts?

#4 RegUS_PatOff

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Posted 11 November 2011 - 11:51 PM

Defrost Terminator (thermostatic switch)
http://www.repaircli...R=154&N=1514997
 
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#5 jumptrout

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Posted 12 November 2011 - 07:03 AM

As far as I know my 632 only has a main logic board. If there's a thermostat, where is it?

The thermistor reads a few ohms short. Subzero couldn't spend a few extra buck and get
precision parts?

It is on the evaporator coil inline with the heater.

#6 asteroids

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Posted 16 December 2011 - 05:45 AM

It WAS the defrost terminator. Thanks.

#7 certified tech group 51

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Posted 16 December 2011 - 11:27 AM

Nothing like a heart warming ending to a suspenseful story............. thanks for the up date...( Hate to be with baited breath and waiting for the end of the story ).........................




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