Display shows dF or a defrost icon for an extended period; freezer may warm slightly during this time.

Safety: If you need to access internal components, unplug the freezer first.

Checks:

• 1. Wait for cycle completion: Many Bomann freezers display dF during a scheduled defrost. This should clear within 20–40 minutes. Avoid opening the door frequently.
• 2. If dF persists for hours: Power-cycle the unit by unplugging for 10 minutes, then plugging back in. If it immediately returns to dF and cooling does not resume, there may be a control or sensor fault.
• 3. Inspect defrost components: Follow the same steps as for defrost sensor and heater faults (see E3/E4). Ensure the defrost sensor is providing correct feedback to the board.
• 4. Control board evaluation: If sensors and heater are normal but the board remains in defrost, the main control board may be defective and require replacement.

Note: A short, periodic dF indication is normal; only prolonged defrost with loss of cooling is a fault.