Error Code 44
Main board and inverter compressor board have lost communication
Moderate
Address soon - your appliance may not work properly
Also displayed as: 44Er
What This Means
Wiring cable problem between Main PCB and Inverter PCB; Inverter PCB failure; Main PCB failure
What actually causes this:
The inverter board that drives the compressor is not communicating with the main control board — the compressor will not run.
First Thing to Check
Inspect the wiring cable connecting the main PCB to the inverter PCB for any damage or loose connection.
Parts Involved
How to Fix
- 1
Check cable connection between Main PCB and Inverter PCB
- 2
Use oscilloscope to verify communication signals
- 3
Replace Main PCB
- 4
Replace Inverter PCB if issue persists after Main PCB replacement
Other Error Codes for RS27FDBTNSR
Fridge defrost sensor has failed or lost connection
Fridge cooling fan motor is not spinning or sending feedback
Freezer temperature sensor has failed or disconnected
Ambient room temperature sensor has failed or disconnected
Fridge temperature sensor has failed or disconnected
Ice maker temperature sensor has failed or disconnected
Freezer defrost sensor has failed or lost connection
Interior humidity sensor has failed or disconnected