Error Code 44
Compressor control board is not responding
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 44C
What This Means
Inverter PCB communication cable not properly connected; Serial data line between Main and Inverter damaged; Main PCB inverter connector defective; Inverter PCB connector defective; Main PCB defective; Inverter PCB defective
What actually causes this:
Inverter cable came unplugged or power supply to inverter is too low
First Thing to Check
Check if compressor is running — no compressor operation indicates inverter communication failure
Parts Involved
How to Fix
- 1
1. Unplug refrigerator
- 2
2. Locate cable connecting Main PCB to Inverter PCB
- 3
3. Inspect connectors for damage, corrosion, or loose fit
- 4
4. Reseat both connectors securely
- 5
5. Check cable for physical damage or pinching
- 6
6. Power on and monitor for error clearance
- 7
7. If error persists, use oscilloscope to check serial data transmission
- 8
8. Check SMPS DC 15V output — should be 13.5V or higher
- 9
9. If communication still fails after cable check, replace Main or Inverter PCB
This Error Applies To
Samsung RF22N9781 Series Refrigerators (2018) (2018–present)
Related Error Codes
Freezer temperature sensor malfunction
Room temperature sensor not working
Ice maker temperature sensor failure
Fridge temperature sensor is not responding
Convertible zone temperature sensor failure
Ice storage area temperature sensor malfunction
Freezer defrost sensor is faulty
Convertible zone defrost sensor malfunction