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4 months ago the coil froze solid on this unit. I opened the back of the freezer compartment and checked resistance on the defrost heater and it checked out OK, so I replaced the defrost switch. The unit ran fine until yesterday, it froze up again. I rechecked the heater and switch and they both appear to be fine. Is there something else on this unit that controls the defrost heater?? (eg defrost timer, control board):(
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Here are your parts Parts for Whirlpool GB2FHDXWS03 Refrigerator - AppliancePartsPros.comSee the attachment for your tech sheet. Yes the control board (item 5 in section 04) runs the defrost cycles. You could unplug the unit and measure from J1-pin 1 (L2 N) to J1-pin 5 (STAT). If you measure the defrost heater resistance then you know the heater and defrost thermostat are OK so it must be a board problem. |
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Just wondering how to check these? I already ordered a control board to try out as I didn't see anywhere in the diagrams/part lists either of these two parts. Thanks in advance....
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The defrost heater is item 10 in section 06. The defrost thermostat is not shown. See the below. The defrost thermostat should be 0 ohms when frozen. The defrosts heater should be about 30 ohms, Part number: AP4428815
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Denman I have been looking at this post and hope you can help me out. I have the same issues and stupidly ordered a circuit board after reading another post about a S in service mode meant a bad board. I see now I should have tested the heater circuit and thermostat circuit. I am trying to figure out if I can test these individually or is this best replaced as a group? thanks for the help..
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If the heater is bad then I would replace both.
If the heater is OK then I would just replace the defrost thermostat.
Also if the thermostat measures OK but is deformed/bulged, replace it. |
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So I tested it last night and got 30ohms of resistance testing at pins 1 and 5 I saw thats good for the heater so thats probably ok? Should it also have resistance for the thermostat? And since Im getting the S on the panel when tested then most likely the thermostat is shoeted?
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[COLOR="Blue"] I saw thats good for the heater so thats probably ok?[/COLOR]
Yes it looks OK
[COLOR="Blue"]Should it also have resistance for the thermostat?[/COLOR]
The thermostat should be 0 ohms when frozen and 56 Kohms (56,000) when thawed.
[COLOR="Blue"]And since Im getting the S on the panel when tested then most likely the thermostat is shoeted?[/COLOR]
Depends if it is frozen or thawed. |
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