Dryer shows F56 and may not heat effectively.

Safety first: Unplug the dryer before internal checks.

Correct ambient and sensor issues:

• Ensure the dryer is installed in a room within the manufacturer’s recommended temperature range (typically above 10°C).
• Check that air inlets are not blocked and that the room is not subject to strong drafts.
• Test the inlet NTC sensor for correct resistance at room temperature; replace if out of specification.
• If the environment and sensor are correct but F56 persists, the control board may require professional diagnosis.