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As I said before, you will need a portable scope to verify the motherboard is puting out a square wave. BUT, without a correct and complete test proceedure for the motor and motherboard,you run the risk of burning out both of them.
If you want to just replace the motor, don't complain to us if it or the motherboard burns out.
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Richappy,
I started another thread,but happened upon this and I think you have descibed my issue. I had a power surge and fried the mother/main control board, it was blackened from smoke and the fridge was dead. I replaced the main board, but didn't realize that the power surge also cooked the evaporator fan motor. The fan motor was visibly scorched and had a short. I replaced the fan motor, but not until after I installed the new main computer/motherboard and ran with it for 24 hours. So, now everything works, except the fan motor, it's only reading 12 volts at the connector. I tested the NEW fan directly and it works fine. Did I fry the motherboard/main computer by installing it with the bad fan motor? If I did, is it common for everything to work, except the fan? Seems like certain functions of the main board are working fine. Oh and I tested the thermistors, they are fine. Thanks Great post John |
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Here's a new problem. I replaced the motherboard and fan motor. Everything worked well for over a month. Then it started getting warmer. So I found the evaporator coil all frosted up. I defrosted in with a blow dryer, and now things seem OK again. Any ideas what might have caused the coil to frost up? Thanks.
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Thanks, I appreciate the feedback.
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