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Check for ice on back wall if iced up check defrost heater and defrost timer also check and besure evaperator fan is working check wireharness on heater, timer, and evap. fan motor.Sounds like you have a defrost prob. Turn off for 24hrs to melt ice turn unit back on if it works for a few days then ices back up you have a defrost prob.
If the fans not working, replace the fan. You could have a defrost problem that causes evaporator boils to freeze over and may be obstructing fan blades. Check door seals also that they are sealing properly.
Make sure that the freezer fan is working and circulating the cold air. Then check the damper assembly to make sure that cold air is being circulated into the refrigerator. And lastly make sure that the self defroster is working - if not the evaporator will freeze up, freezer temps go up, and ice maker will not work if freezer temps are 10 degrees or higher. A digital refrigerator thermometer will confirm freezer temps being high.
Since your refrig is cooling , I would replace the # 4 AND # 5 thermistors . The # 4 thermistor , tells the main control board , the temp of the coils , if they need defrosted , when they are thru defrosting . This thermistor is the 1 " long , torpedo looking piece , clipped on the top left of the coils , with 2 white wires going to it . Part number WR55X10025 . It would be advisable to also replace the # 5 thermistor , located at the bottom of the freezer , slightly in front of the drain , also with 2 white wires going to it , slid into a housing . This thermistor , is the freezer thermistor , which tells the control board , the freezer temp , when to cycle off , associated with the fan speed also .
When the compressor is running, both the fan inside the freezer and the fan down by the compressor should be running. If OK, look for frost on the back wall of the freezer, indicating a probable defrost heater failure. If yes, remove back metal cover in freezer, defrost with hair blower, replace defrost heater (the thing at the bottom of the freezer coils with two wires going to it)
If no to these, send me an "ask me" follow up question.
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