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Defrost control troubleshooting


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4 replies to this topic

#1 letmeout

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Posted 21 August 2013 - 09:48 AM

We have a French door bottom mount Whirlpool fridge with freezer frost build up problem.

In your very helpful post titled...

How to test and replace the ADC "Jazz" circuit board in Maytag and Amana refrigerators

Read more: http://appliantology.../#ixzz2cc6wRLTz
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...you diagnose a failed ADC by using the Forced Defrost mode.  My defrost heater element functions fine in FD mode and the compressor shuts off also.  Both thermisters pass the built in test and the defrost terminator behaves properly after manual defrost (Open) and during operation (Shorted).  Can the board fail in such a way that FD operates but self initiated defrost does not?

 

Thanks,

 

Matt



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#2 Strathy

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Posted 21 August 2013 - 09:54 AM

Yes.


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Servicing Southern Manitoba, Canada

#3 letmeout

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Posted 21 August 2013 - 10:00 AM

Thanks for the help.  So clearly need to replace the board?



#4 micabay

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Posted 21 August 2013 - 11:11 AM

Yes. If nothing else is wrong with the defrost circuit, the board is the next most likly suspect.

#5 letmeout

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Posted 21 August 2013 - 11:50 AM

Thank you very much.

 

Matt






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