Charging stops or will not start; E06 indicates contactor or relay fault; audible clicking may be absent or repeated.

Safety first: The main contactor switches high current. Only trained personnel should open the charger and work near it.

• Listen during start: When plugging in, you should normally hear a solid ‘clack’ from the internal contactor. No sound or rapid chattering suggests a fault.
• Power cycle: Turn off the breaker for 2 minutes, then restore power and retry. Transient faults may clear.
• Check load history: If the charger has frequently run at maximum current in hot conditions, the contactor may be worn or welded.
• Professional inspection: A technician should open the Webasto unit, inspect the contactor for discoloration or pitting, and verify coil voltage from the control board.
• Replace if faulty: Do not attempt to file or clean welded contacts. Replace the contactor with the exact Webasto-specified part.