Webasto charger emits loud humming, buzzing, or clicking noises during operation beyond normal contactor sounds.

Safety first: Unusual noises can indicate impending mechanical failure. Avoid prolonged use until checked.

• Identify source: Stand near the charger during start‑up and charging to localize the noise (top, bottom, left, right).
• Check mounting: Ensure the charger housing is firmly mounted to the wall and not resonating.
• Professional inspection: A technician can open the unit, tighten mounting screws for the contactor and any transformers, and replace noisy components if necessary.
• Monitor operation: If noise worsens or is accompanied by errors or overheating, stop using the charger until repaired.