GE refrigerator side too cold

Refrigerator & Freezer Repair
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1

My GE Monogram side by side built in refrigerator model # ZISS480DRBS never gets above freezing - mostly around 28 degrees. Doesn’t respond much at all to temp settings. Freezer works perfectly. I replaced the fridge temp sensor without improvement.

Text conversation with this site’s parts tech who said it is Main Control Board Assembly, part # AP3885943. On searching other sites, what sounds like same problem diagnosed as Damper Control Assembly (door stuck open?). Would prefer ordering the correct solution. Any suggestions as to tracking down the problem?

2

If your damper control has a wiring harness/ wiring clip running to it, unplug the wires and see what it does, if it a mechanical type, it may be hanging open.
Some people call this a diffuser.