Intermittent F4 error on display, oven may shut off or fail to reach set temperature.

Safety first: Turn off power at the breaker before accessing rear panels or control area.

Steps to check:

• Moisture check: If F4 appears after self-clean or heavy steam cooking, allow the oven to dry for several hours with the door open. Moisture in connectors can cause temporary shorts.
• Inspect sensor and wiring: Remove the oven sensor and inspect the wiring for nicks or melted spots where it passes through the rear wall. Replace if insulation is compromised.
• Connector cleaning: Disconnect the sensor plug at the rear or at the control board. Clean contacts with electrical contact cleaner and reconnect firmly.
• Replace sensor: If F4 recurs, replace the oven temperature sensor as a first step; it is more common than a board failure.
• Control board: If a new sensor does not resolve the issue, replace the EOC.

Warning: Do not run self-clean cycles until the F4 issue is resolved; overheating can worsen wiring damage.