GE PVD28BYNFS Freezer Issue - Ice Build Up
Hello. I am having issues with our freezer not keeping items cold enough. Ran diagnostics and it returned a Defrost System Error of 0200, "Freezer defrost heater on for max time. (Check FZ evap thermistor fault 0004)”.
The first picture is what it looked like when I was able to take off the Freezer Evaporator Cover and the second photo is after I unplugged and used my hair dryer for 30 minutes on it.
I am trying to determine if it is the heater, thermistor, or both. I ran the Freezer Defrost Heater Test (Test 60) and I went to measure the voltage and resistance on the main control board. Using the instructions in the repair manual:
"To check voltage at the below points use the freezer defrost heater test 60 from Service Mode.
J3 Connector on Main Board
• Pin 1 (orange) to pin 2 (red): 66Ω
• Pin 1 (orange) to pin 2 (red): 120 VAC"
It is difficult to read the pins on the board insofar as trying to get good contact. What I believe I am seeing in only 8 VAC and an open resistance which make me think it is the heater.
Could it only be the Thermistor causing this or am I correct in my troubleshooting?
I am hoping I’m missing something obvious as the $8 thermistor is much easier and cheaper to replace than the $85 heater element.
Thanks in advance!
Posted Dec 7, 2025, 10:53 PM UTC · edited