Oven display shows F7 and none of the heating functions operate.

Safety first: Switch off the circuit breaker and verify the oven is de-energized. High voltages are present inside; if unsure, use a professional.

Basic checks:

• Confirm that the household circuit breaker has not tripped and that correct voltage is present at the wall outlet or junction box.
• Inspect the oven terminal block (where the mains cable connects) for burnt connections or loose screws; tighten or replace the block if damaged.

Control module inspection:

• Remove the top or rear cover to access the electronic power board.
• Look for obvious signs of damage: burnt components, cracked solder joints, or melted plastic around the main relay.
• If the relay is visibly damaged or the board smells burnt, the entire module should be replaced with the correct Liebherr control board.
• Transferring wiring must be done carefully, one connector at a time, to avoid miswiring.

Because this fault involves live mains switching, board-level repair is not recommended for untrained users. If no obvious external cause is found, contact a Liebherr service partner.