How do I fix error code 43C on a Samsung refrigerators?

1. undefined: 1. Check compressor inverter communication connector 2. undefined: 2. Verify all connections are properly seated 3. undefined: 3. Inspect communication wires for damage or disconnection 4. undefined: 4. Use oscilloscope to verify communication signal 5. undefined: 5. Check PCB soldering quality on inverter board 6. undefined: 6. If connections normal, replace Main PBA 7. undefined: 7. If issue persists, replace Compressor Inverter PBA

Samsung Refrigerators2024–present

Error Code 43C

The main board can't communicate with the compressor inverter

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: 43C

What This Means

Inverter communication wire disconnection; Inverter connector contact error; Defective Compressor Inverter PBA; Defective Main PBA; Soldering defect on PCB

What actually causes this:

The compressor control board connection is loose

First Thing to Check

The compressor won't run

Parts Involved

Main PBACompressor Inverter PBACommunication WireConnector

How to Fix

1
1. Check compressor inverter communication connector
2
2. Verify all connections are properly seated
3
3. Inspect communication wires for damage or disconnection
4
4. Use oscilloscope to verify communication signal
5
5. Check PCB soldering quality on inverter board
6
6. If connections normal, replace Main PBA
7
7. If issue persists, replace Compressor Inverter PBA

This Error Applies To

Samsung RF2 Series Refrigerators (2024) (2024–present)

Service manual exact match: RF29DService manual exact match: RF23DService manual exact match: RF29DB9900Service manual exact match: RF23DB9900Service manual exact match: RF29DB9750Service manual exact match: RF23DB9750Service manual exact match: RF29DB9700Service manual exact match: RF23DB9700+2 more