Samsung Refrigerator Error Code 45E — Inverter Board Communication Error
What this means
The 45E error code indicates a communication failure between the main PCB (control board) and the inverter board that controls the compressor. Without proper communication, the compressor cannot be regulated, which may cause the refrigerator to stop cooling. The inverter board is typically located on the back of the refrigerator near the compressor.
Alternate codes: 45C
Step-by-step fix
3 stepsReset the refrigerator
Unplug the refrigerator for 10 minutes, then plug it back in. A power surge can disrupt communication between boards temporarily.
Listen for the compressor to start within a few minutes of powering back on.
Check the wire harness between boards
Unplug the refrigerator and access the inverter board on the back (near the compressor). Check the wire harness connecting the main board to the inverter board for loose, corroded, or damaged connectors.
Reseat each connector firmly. Look for signs of moisture or pest damage to the wiring.
Inspect the inverter board
Remove the inverter board cover and inspect the board for visible signs of damage: burnt components, swollen capacitors, scorch marks, or corrosion.
The inverter board is exposed to more heat and moisture than the main board, making it more prone to failure.
When to call a professional
Inverter board replacement requires matching the correct board to your compressor type. A technician should diagnose whether the inverter board, main board, or compressor itself is the issue.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Inverter Board
Part #DA92-00763L · $80–$150
If inverter board shows visible damage or fails diagnostics
Main Control Board
Part #DA41-00651M · $100–$200
If main board is the source of communication failure
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