AGA oven takes excessively long to reach temperature or never reaches set temperature

Safety first: Isolate power or gas before inspection.

• Check door seal: Inspect the oven door gasket for splits, gaps, or hardened sections. Close the door on a sheet of paper; if it pulls out easily, the seal or hinges may be worn.
• Test all heating modes: Try fan, conventional, and grill. If one element is not working, the oven may heat slowly.
• Inspect hinges: Ensure the door closes firmly and is not sagging. Replace worn hinges if necessary.
• Monitor preheat time: A typical AGA electric oven should reach 180°C in around 10–15 minutes. Significantly longer times suggest an element or thermostat issue.

When to call a technician: If elements and seals appear intact but performance is poor, an engineer should test the thermostat and internal wiring.