Author Topic: Not defrosting.. replaced a few things but I don't know how to continu  (Read 3941 times)

Offline travs69

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Ok. so I got the dreaded not defrosting issue.. heater looked black so I replaced it and the defrost thermostat (the really round one with orange/pink wires).  It is still not defrosting, I have done what checks I think I should.  I am getting 23ohms on the heater and I get continuity through the whole ciruit, but I never see 120v.  On the board on the plug marked continuity (where the orange where goes) I noticed everything does a continuity check to ground except grey and yellow, I'm not sure where these go yet and I don't know if it's an issue.  

I don't know if the thermister is good at the top of the evaporator and I'm not 99% sure I know how to check.   I'm wondering if anyone has any other suggestions besides just replacing the board.

I did put the fridge in thermister test mode but I don't know how to decode the results.

Model GSH25JSTA

Offline travs69

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So I found the manual (on here thank you) that described the tests results.  It says Number 1 failed, (0 1) Number 5 failed, but I'm not sure what the failure code was.. it kind of looked like a p with out a piece of it (not sure hot to explain).


Will the freezer thermistor keep it from defrosting?

Offline jumptrout51

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Replace the main control board.
Take a Kid fishing.

Offline travs69

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You don't think there's a bad thermister? I thought that would keep it from defrosting?

Online tcape

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First, I would like to thank Roy from another board who helped me fix mine.
If this one is anything like the one I was working on, at the bottom of the board in the back are connectors(1 or 3) for L1, Defrost and Compressor.

Being extremely careful, disconnect the compressor connection(so it doesn't pop a circuit breaker while testing the heater), leaving the L1 and defrost connected.

If you jump out the Defrost and L1, you are sending power directly to the heater. If the heater works, the board is bad. If the heater doesn't work, the only thing that would prevent it from coming on is the defrost thermostat(at the top of the evap coil- on mine pink-orange wire) is open. Jump out the defrost thermostat and if this doesn't work, it's the heater.

If you have 120v at the heater but no heat, it's the heater.


Offline Icehouse

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First, I would like to thank Roy from another board who helped me fix mine.
If this one is anything like the one I was working on, at the bottom of the board in the back are connectors(1 or 3) for L1, Defrost and Compressor.

Being extremely careful, disconnect the compressor connection(so it doesn't pop a circuit breaker while testing the heater), leaving the L1 and defrost connected.

If you jump out the Defrost and L1, you are sending power directly to the heater. If the heater works, the board is bad. If the heater doesn't work, the only thing that would prevent it from coming on is the defrost thermostat(at the top of the evap coil- on mine pink-orange wire) is open. Jump out the defrost thermostat and if this doesn't work, it's the heater.

If you have 120v at the heater but no heat, it's the heater.


Sure forget the "ole fart"  ;)  :2funny:
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
a tragedy has happen to me : http://web.me.com/zenzoidman/Bobice/

Offline JWWebster

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Great info tcape.
May the hinges of our friendship
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About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.
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Online tcape

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[/quote] Sure forget the "ole fart"  ;)  :2funny:
[/quote]

I humbly apologize...icemeister!

I will give you double recognition the next time I have an opportunity!


Tony

Offline Icehouse

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  I am Icehouse, not Icemiester. Don't want Charlie mad at you.  :)
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
a tragedy has happen to me : http://web.me.com/zenzoidman/Bobice/

Online tcape

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  I am Icehouse, not Icemiester. Don't want Charlie mad at you.  :)

Jeez! I'm sorry... I think I spend too much time at the computer, I humbly apologize again Icehouse!

Now I owe you triple recognition!

Tony

Offline Icehouse

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 :) To forgive is Devinne.
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
a tragedy has happen to me : http://web.me.com/zenzoidman/Bobice/

Offline davidbriggs

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Have two refrigerators where live test to heater worked but after new boards, heaters and bi metals they are still not defrosting?!  Now could it be a thermistor?

Offline Repair-man

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Quote
Now could it be a thermistor?

Yes, you've replaced everything BUT :)

My rule of thumb in the field is always replace the temp thermister in the freezer when doing a defrost kit.
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

Offline davidbriggs

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evap thermistor or compartment or both?

Offline Repair-man

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Why not do them both...only a few bucks apiece.
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

 

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