E9 error code, oven cuts out or will not start; sometimes accompanied by tripping the breaker.

Safety first: Turn off power at the consumer unit. Do not reset repeatedly if the breaker trips; find the cause first.

Steps to check:

• Visual inspection: Remove the rear cover and inspect the mains terminal block and wiring for signs of burning or melting.
• Element test: Disconnect each heating element (top, bottom, grill) and test for continuity to earth (chassis). Any element showing a short to earth must be replaced.
• Check control board: Inspect the main PCB for burnt tracks or relays. A strong burnt smell or visible damage indicates failure.
• Tighten terminals: Ensure all screws on the mains terminal block are tight to prevent arcing.
• Replace faulty parts: Replace any shorted element and, if necessary, the main control/relay board. If you are not experienced with mains wiring, use a qualified technician.