Oven does not heat at all in any mode, no error code displayed, fan and light may still work.

Safety first: Disconnect the oven from mains before removing covers.

• Check basic functions: Confirm that the oven light and fan operate. If they do, supply is present but heating circuit may be open.
• Inspect terminal block: Access the rear terminal block and check for burnt or loose connections. Tighten screws and replace any melted parts.
• Locate and test thermal fuse: Find the thermal fuse on top or rear of the cavity. Test for continuity; if open, replace with the same rating and investigate overheating causes.
• Check selector switch (if fitted): On mechanical models, test the oven function selector switch for continuity between common and heater outputs in each mode. Replace the switch if contacts are open when they should be closed.
• Check common feed wire: Trace the live feed from the terminal block through the safety devices to the elements. Repair any broken or burnt wires.