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Freezer barely freezing and fridge not cooling properly


Jan 11, 2014
Brogue, Pennsylvania
Model Number
1-5 years
Freezer side reads 5 and fridge side reads 43-47...fridge side also freezes things in the bottom. I haven't heard the evap fan come on for a long time, and I'm also seeing thermistor and defrost thermostat on other sites. Need to get an idea of where to go with this thing !
Last edited:


Appliance Tech
May 24, 2005
Canton OH
Is the back panel in the freezer completely coated with frost? This would indicate a defrost issue.

You have 3 parts that control the auto defrost cycle, the motherboard, the evaporator thermistor, and the defrost heater.

So what we do is a process of elimination to determine the bad part. So you will want to unplug your refrigerator and test the defrost heater first, but don't defrost it yet before testing it because if the heater checks good then you will need to test the evaporator thermistor that's mounted on the top of your evaporator coil, and that needs to be covered in frost to test that.

Unplug the refrigerator first, then test the defrost heater first, take the wires off before testing. Watch the video below to test it, if that tests fine, then watch the video Shawn made to test your defrost thermistor. If both test fine, then your motherboard is the bad part.

Here's the evaporator thermistor for your model:
Thermistor WR55X10025

Watch this video, Shawn explains how to test/replace the evaporator thermistor:

Here's the defrost heater for your model:
Defrost Heater Assembly WR51X10055

Here's the motherboard for your model:
Main Control Board WR55X10942

Watch this video to test your defrost heater:

If not a defrost issue then you should replace both the motherboard and the evaporator fan motor.

Main Control Board WR55X10942

Evaporator Fan Motor WR60X10307
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