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Temp. control board would change temps by itself after a temperature was entered. (ie. set freezer to 0 degrees and it would jump to 71, same with fresh food side) I changed out the temp. control board and the new one has all three digits on freezer temp and refrig. temp lit up. (ie. 111 &111) As you advance the temp up on either one the digits jump to 222, 333,444 etc. I think the new board is bad. Can you confirm this?
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What is the part number of the control board you installed? Did it come with the installation instructions? If it did, did you follow the instructions?
Gene.
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Originally Posted by: Gene  What is the part number of the control board you installed? Did it come with the installation instructions? If it did, did you follow the instructions?
Gene. Part #WR55X10120. Installation instructions very brief, said there will be an unused connector with this install which was correct. The original board also had an unused connector. I compared the two boards (old and new) and they are identical.
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In such situation I would suspect the main control board (on the back of the fridge) because it supplies power for the temperature control board. - The main control board Part number: AP4436216
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Originally Posted by: Gene In such situation I would suspect the main control board (on the back of the fridge) because it supplies power for the temperature control board. - The main control board Part number: AP4436216
Gene, I also suspected a bad main board and replaced it and had the same result with the temp. control board.
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Check for DC voltage between the J4-2 & J4-3 and J4-2 & J4-1 at the main control board. Post the results.
Gene.
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