Which part is usually at fault for LG error F45?

The most commonly implicated component is the power supply.

What is the first thing to try for LG error F45?

Turn the circuit breaker to the unit off and wait 30 seconds before turning it back on.

Error F45 Degraded US market

F45 on a LG oven / range usually means: F45 indicates a Fan Error. On a LG Oven / Range, code F45 points to the power supply.

Fix it fast: Manufacturer troubleshooting steps. Full ranked steps below.

Manufacturer source Updated Oct 17, 2026 View source

Try these in order. Stop when the code clears.

1 Manufacturer troubleshooting steps
DIY
- Turn the circuit breaker to the unit off and wait 30 seconds before turning it back on.
Source

A voltage error was detected. On a LG Oven / Range, code F42 points to the power supply.

F17 indicates an Convection Fan Error. On a LG Oven / Range, code F17 points to the power supply.

F18 indicates an Oven Meat Probe Error. On a LG Oven / Range, code F18 points to the power supply.

F21 indicates a Steam Sensor Failure. On a LG Oven / Range, code F21 points to the power supply.

F22 indicates a Steam Sensor Failure. On a LG Oven / Range, code F22 points to the power supply.

F24 indicates a Steam Sensor Failure. On a LG Oven / Range, code F24 points to the power supply.

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