First post. Sorry this is so long, but I thought I cover as much as I could to save time.

I have a Frigidaire Gallery Refrigerator, model FGHB2866PF2. The freezer is working fine but the refrigerator is warm (~55F). There are no error codes showing. I ran the diagnostics and had two tests I wasn’t sure about.
“Test #2 Freezer Door Heater. Evaporator thermistor temperature is flashed. Watch for temp increase with the heater on.“ No temperature flashed, maybe because heater is not on.
“Test #38 VCC Compressor” I can hear the compressor running but doesn’t seem to turn off/on.

There was a slight buildup of frost/ice on the back corner of the Frig by the ice machine. I removed the ice machine, auger unit and the plastic cover over the evaporator coils and heater. Everything was iced up inside. Evaporator Fan Motor inside the auger was working fine.

Using a Fluke 77 DMM and checked the resistance of the defrost thermostat when it was frosted in place, DMM reads a 0.00 / dead short. Defrosted everything with hair dryer, removed the thermostat from copper pipe and let it warm up for 3-4 hours to ~55F, DMM reads an open/OL. Placed in Freezer overnight with same results.
Checked the heater coil it reads 182 ohms. I verified the heater measurement against a new Frigidaire heater still in the bag and it matched the resistance +/-1.0.


When the heater and thermostat were still frozen in the ice, check the back side of the white 4 pin connector (2 heater and 2 thermostat wires). No voltage on any pin. The brown wire going to the heater should have 110VAC on it and it does not.

Followed the brown wire back through the auger unit (straight shot with no other connections inside) to the nine pin connector of the Frig wire harness. With the probe on the Frig harness side of the 9 pin brown wire, there is no voltage.

With the probe still on the Frig harness side and without moving the DMM probes, when I disconnect the 9 pin connector’s shell halves from each other and I have 110VAC on the Frig side of the 9 pin connector. When connected, 0.0 VAC. Repeated several times with same results. Nothing intermittent.
Checked the brown wire continuity from the Frig side harness of the 9 pin connector to the heat/thermostat 4 pin connector and it reads good.
NOTE: Using the User Interface, I placed it in Automatic Defrost Mode (DF) and heater turns on, raised to +150F and rising before I turned it off. Afraid of damaging heater.

So I was sure it was the Main Control Board (242115283) and after a chat with the Appliance Parts Pro help line and that person thought so too. So I ordered one from Appliance Parts Pro. Didn't fix it.
Don’t know what to do next.
Any suggestions are greatly appreciated.
Thank you for your help.
Ray
Orlando