Charger makes loud buzzing, humming, or clicking noises during operation.

Safety first: Turn OFF power before touching or tightening any internal components.

• 1. Identify noise source: Remove the cover (power OFF) and locate the component that vibrates or buzzes when charging (usually the contactor).
• 2. Check mounting: Ensure the contactor and any transformers are firmly mounted to the backplate. Tighten mounting screws.
• 3. Inspect contactor: Look for signs of wear or heat damage. If the contactor buzzes loudly only when energized, its coil or core may be worn.
• 4. Replace contactor: Install a new EvoCharge-specified contactor if noise is excessive or accompanied by intermittent operation.
• 5. Verify coil voltage: Confirm the contactor coil voltage matches the control circuit output; mismatched coils can hum loudly.

Mild humming can be normal, but sudden or very loud noises indicate a component nearing failure.