Error Code 44C
Main board and compressor inverter board cannot communicate
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 44C
What This Means
Loose or damaged communication cable between Main PCB and Inverter PCB; Defective Main PCB; Defective Inverter PCB
What actually causes this:
Communication harness between the two boards is loose or one of the PCBs has failed.
First Thing to Check
Reseat the communication connector between the Main PCB and Inverter PCB in the machine compartment.
Parts Involved
How to Fix
- 1
Check communication cable connections between Main PCB and Inverter PCB
- 2
Confirm cable has no breaks or pinches
- 3
Replace Main PCB first, then Inverter PCB if communication error persists
- 4
Use oscilloscope to confirm communication signal if available
Other Error Codes for RF23CB9900QKAA
Door showcase heater has an open or short circuit fault
Ice Bites ice maker temperature sensor reading invalid
Internal I/O expander chip on Main PCB has lost communication
Ambient air temperature sensor reading invalid
Freezer defrost sensor reading out of valid range
Freezer evaporator fan not running or not sending feedback signal
Flex Crisper compartment sensor out of valid range
Fridge compartment defrost sensor reading out of valid range