AGA oven displays F18; interior light may not work and oven may not start certain programs.

Safety first: Disconnect the oven from mains power before working around the door area.

• Check door closure: Ensure the door closes fully and evenly. Adjust hinges if the door is sagging.
• Test door switch: Locate the door switch (often behind the front frame). Press it manually and listen for a click. Test continuity with a multimeter in both pressed and released positions.
• Inspect actuator: Confirm that the door correctly depresses the switch plunger when closed. Adjust or replace the actuator tab if bent.
• Check wiring: Inspect the switch wiring for breaks or loose connectors.
• Replace switch: If the switch is intermittent or open when pressed, replace it with an AGA-compatible door switch.