Charger makes loud clicking, popping, or crackling sounds when starting or during charging.

Safety first: Turn OFF the breaker immediately if you hear loud or irregular electrical noises. Do not continue to use the charger.

Steps to try:

• Smell test: After power is off, carefully smell near the charger for any burnt odor, which indicates internal damage.
• Visual check: Look for discoloration or warping of the enclosure. Do not open the unit unless you are qualified.

When to call a technician: A technician must open the charger, inspect the contactor and power bus for arcing damage, tighten or replace connections, and replace the contactor or power board if necessary.