Oven does not heat in fan-forced or convection mode; fan runs but temperature does not rise.

Safety warning: Isolate the oven from mains power before removing covers. Metal edges can be sharp; wear cut-resistant gloves.

• 1. Verify convection mode: Select a fan-forced or convection program and set temperature to 180–200°C. If the fan runs but the oven stays cool, suspect the convection heater.
• 2. Access the rear heater: Remove the oven from the cabinet if necessary. Take off the rear cover to expose the circular convection heater around the fan motor (typical in Panasonic built-in ovens).
• 3. Inspect the heater ring: Look for visible breaks, hot spots, or burn marks on the circular element.
• 4. Test resistance: Disconnect one terminal and measure resistance across the convection heater. An open circuit indicates a failed element that must be replaced.
• 5. Check rear thermal fuse: Many Panasonic ovens use a thermal fuse or thermostat mounted near the convection heater. Test for continuity; if open, replace with the exact Panasonic-rated part.
• 6. Wiring and relay check: Inspect the wiring harness from the heater to the main control board. If wiring is intact and the heater tests good, the convection heater relay on the power board may be defective and will require professional repair.

Only use genuine or equivalent-rated Panasonic convection heater assemblies to avoid overheating and fire risk.