Came home from vacation to find the freezer at 40 deg and the ref at 68 deg. Heavy layer of ice on freezer back wall and fan frozen in place. Did some research and performed the below actions but have not figured out problem.
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Tested the J7 plug blue wire to the J9 orange wire for continuity - got 30.8 ohms at the plugs when unplugged from main board.
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Tested the evap thermistor at approx. 35 deg - got 15.9K ohms at the J1 white wires 4 & 5 from L to R while unplugged.
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Tested the freezer thermistor at approx. 35 deg - got 15.7K ohms at the J1 plug wires 3 & 5 white from L to R unplugged.
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Unplugged and tested the defrost heater - got 31.2 ohms between the terminals.
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Tested the defrost thermostat by poking the multimeter leads into the pink and orange wires while at room temperature. Got .002 ohms.
I defrosted the evap coil and plugged the unit back in - seems to be working fine but I’ll assume that will only be until it frosts back up again. Cannot figure out what is actually wrong with unit unless it’s the main board.
Any assistance appreciated. Thanks, K