Thanks for the info Gene. Sorry for the delayed response, I was out of town for a couple of weeks. I just got back and tried out a couple of things that you recommended. Here's what I found out ...
1. On the main control board I couldn't figure out which one was the "defrost terminal wire" to remove and check with pin 9 on j7 connector ?
2. I disconnected the defrost heater to checked for continuity and it showed 150 mega ohms resistance which I believe should be considered as open. Anyways, I took the defrost heater unit apart and found out that a small section of the heating coil was burnt out. I stretched out the coil a bit and intertwined the two ends and checked the resistance and it showed 5 mega ohms. Don't know if that's ok but I reassembled the unit and connected it back in. Hopefully now the coil will heat up and defrost the condenser coil.
I hope that solves my problem. In any case I am going to order the defrost heater and replace it. Just want to find out if that is the only problem or do I have issues with the defrost thermostat too.
3. Moreover, I couldn't figure out how to check for continuity on the defrost thermostat easily without removing the icemaker unit so I put that on hold for some time. If hardwiring the defrost heater coil does the trick then I'll know that I need to order just that.
I'll post my findings soon.
Thanks again Gene.
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