Charger enclosure is warm but not hot; user notices a faint humming or buzzing sound during operation.

Safety first: Do not remove the cover while the charger is energized.

Steps to try:

• Check mounting: Ensure the charger is firmly mounted to a solid wall or backing board. Tighten mounting screws if loose.
• Observe pattern: A brief click and low hum only while charging is typically normal. Loud, harsh buzzing or crackling is not.
• Monitor temperature: The enclosure may feel warm during charging but should not be uncomfortably hot.

When to call a technician: If the noise is loud, changes suddenly, or is accompanied by a burning smell or excessive heat, turn OFF the breaker and contact an EVSE technician to inspect the contactor and internal components.