Oven does not reach set temperature, F3 error appears during preheat or mid-cycle.

Safety first: Isolate the oven from mains power before removing any panels.

• Visual element check: Inspect the visible elements (grill/top and bottom) for breaks, blisters, or burn marks. A visibly broken element must be replaced.
• Continuity test: Access the rear of the oven and disconnect the element terminals. Use a multimeter to check continuity. A healthy element typically shows 15–60 Ω depending on type. Infinite resistance indicates a failed element.
• Check connectors: Ensure spade connectors are tight and not heat-damaged. Replace any burnt terminals and crimp new insulated connectors if needed.
• Relay/power board: If all elements test good, the fault may be on the power module or main control board (relay not energising). Listen for relay clicks when starting a program. No click plus good elements suggests a board fault.
• Replace faulty element: Remove fixing screws or brackets, slide the element out, transfer any insulation or brackets, and install the new AEG-compatible element. Reconnect wiring exactly as original.

Warning: Incorrect wiring of elements can cause short circuits and fire risk. Take photos before disconnecting wires.