AGA range shows F5, oven may not heat or may behave erratically

Safety first: Turn off power at the breaker before removing any panels.

• Power cycle: Isolate the cooker for 5–10 minutes, then restore power. If F5 clears and does not return, monitor operation.
• Check element wiring: Remove the rear panel and inspect wiring to the main oven elements and grill element. Ensure all spade terminals are tight and not burnt.
• Inspect control board: Look for obvious signs of damage on the electronic oven control (burnt spots, bulging components). If present, the board must be replaced.
• Configuration (installer-level): Some AGA electronic models require configuration after board replacement. If F5 appeared after a repair, the board may not be configured correctly and will need an engineer with the correct service documentation.

When to call a technician: F5 often indicates an internal control fault. If basic checks do not resolve it, arrange professional service.