If it happens again and they won't do a warranty replacement then I'm probably going to replace the contactor. The contactors themselves tend to be sealed units and cannot be repaired or cleaned as far as I know. I haven't opened up the EVSE to see which one they are using but most run in the...
It is possible your problem is with the EVSE and not with the car. We have had similar problems with our Clipper Creek 40A unit. We are on our third unit in three years (very good customer service and free replacement so I can't complain too much about that). The problem is that over time the...