F4 E9 — Inverter and Magnetron Over Temperature

What does F4 E9 mean?

Both the inverter and the magnetron, key components for microwave operation, have reported overheating. This strongly suggests a problem with the oven's cooling system.

• Loose cooling fan connection
• Blocked air vent at the bottom of the oven
• Stalled or faulty cooling fan

Click steps to track your progress.

1. 1

   Unplug the oven or disconnect its power at the circuit breaker for at least 10 seconds.

2. 2

   Plug the oven back in or restore power.

3. 3

   Check the oven's installation to ensure there is no air blockage at the bottom vent. Clear any obstructions.

4. 4

   Place a microwave-safe cup of water in the cavity and start a microwave cooking function. Listen to ensure the cooling fan is running.

5. 5

   If the error persists, contact customer service for assistance.