Yiwei for Model Number WRT549SZDM00 It is a 3 years old fridge. One month ago started frost in fridge part, vegetables frozen. But gradually both freezer and fridge parts do not cool down (fridge temp goes up to ~RT, freezer part 12~15C). Opened it to check and cleaned condenser coils and drain piper. Compressor is working. Freezer fan is working. Big ice buck is on the coil around thermistor part. Checked thermistor resistance, the reading is 2.3 oms @ 20K range on room temp, 0.23 @200K range. Didn’t test cold temp. The thermistor part number should be wpw10383615? Don’t know if this reading indicating thermistor good or not? What other problem could be? Appreciate very much for your help.
Answer Hello Yiwei, the thermistor is reading in range. Suggest you thaw the evap coil completely, secure the thermistor to the tubing with a wire tye or two, and overwrap with a small strip of foil tape, if the coil again builds up an ice (not frost ) block in the same area there is a sealed system problem. Read More... Answered by AppliancePartsPros.com | Tuesday, September 8, 2020