Charger emits a high-pitched whine or electronic noise during operation.

Safety first: Noise alone is not usually dangerous, but any internal inspection requires power OFF.

• 1. Determine if new or existing: If the noise is new or has become louder, it may indicate component aging.
• 2. Listen for location: With the cover removed (power OFF, then ON only if qualified), identify whether the noise comes from the power supply area or contactor.
• 3. Inspect capacitors: Look for bulging or leaking capacitors on the power supply section of the control board.
• 4. Replace noisy components: If a specific transformer or power module is identified as the source and is replaceable, install an EvoCharge-approved replacement.
• 5. Monitor operation: If noise is minor and no other symptoms are present, monitor for changes. If accompanied by overheating or faults, service promptly.

High-pitched noise can be annoying but is often a sign of components nearing end of life.