Charger displays E07 and refuses to charge; may be logged as ‘contactor fault’ or ‘relay weld detection’.

Safety first: A welded contactor can leave the output live even when the charger indicates OFF. Do not open the charger or touch internal wiring unless you are a qualified electrician. Isolate power at the upstream breaker before any inspection.

Steps to try:

• Stop using the charger: Turn OFF the dedicated EV charger breaker and leave it OFF until the contactor is checked.
• Check for residual voltage (electrician only): A professional should verify that no voltage is present at the charger output when the contactor is commanded open.
• Inspect contactor: The technician should open the enclosure, visually inspect the power contactor for signs of overheating or melting, and test coil and auxiliary contacts.
• Replace defective contactor: If welding or mechanical failure is found, replace the power contactor assembly with a Hager‑approved part. Ensure all terminals are tightened to the specified torque.
• Test operation: After replacement, perform several start/stop cycles with a vehicle connected to confirm that E07 no longer appears and that the contactor opens and closes correctly.