I Have a GE Side by Side purchased 2004. My sister has the same frig purchased the same time, both friges a are doing the same thing.
The freezer is freezing up causing the frig to warm. Today I replaced the Main control board, the defrost heater and the defrost themastat costing $175.oo. My question is, can we get away with just changing the heater and thermastat in the other frig or will the main board cause the new heater to go out, that is what I was told. Is there a simple way to check the main control board. The friges have been doing this for about a year, what we do is just take everthing out of the freezer and unplug the frig for about 24 hour or so, and than the frig will work fine for about 2 months. Thanks,
Mary

I will replace the heater and the thermostat, but it the main board is not working proberly will it burn out the new heater?

Found evaporator froze up. Test defrost system found defrost thermostat closed all the time. Replace defrost thermostat after
5 days system froze back up. Appliance company said to replace
mother board. Replaced the mother board nothing worked. Took
board back gave another and that system came up running motor
in freezer will only turn in slow speed. Put old mother board back
in , motor is turning up to speed but old board does not defros.
Board appliance company gave to replace mother board is Model
WR55X10656. Now they say motor need to be replace in freezer
but motor works good with old board but old board will not defrost
any suggestions what to do????????

We replaced the thermostat also and the heater is working.