My unit has power but the compressor and fan is not running at all, any suggestions?
You will want to access the main control board on the back of the unit and check for power going to the compressor. If you check from J3 connector which is a black wire to the orange wire on the J7 pin 9 there should be 120 vac. If there is not then the main control board WR55X10942 is faulty and would need to be replaced.
My freezer section has been getting really warm. Some days its cold and working fine but then the next day, it would be warm and ice would be melting. The coils do get cold but once it does ice up, it doesn't melt which causes the back panel to be covered in ice. I did replace the Defrost Heater few years back. Also the fan in the back of the freezer doesn't run most of the time and when it does, it doesn't blow much cold air.
If you are having an issue with the coils in the back of the freezer frosting up then there is a defrost issue and you will want to check the defrost heater and limiter. Also check the defrost thermistor which is located on the top of the evaporator coils. The heater and limiter you will check for continuity. No continuity means that they are bad and need to be replaced. The thermistor will check for resistance. The resistance value should be 42.2K at 0 degrees and 14.4 at 37 degrees. If not then the thermistor is bad and would need to be replaced. If the thermistor checks ok then the control board would be faulty and need to be replaced.