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Hi there

Thanks for the info, but I don't think that applies here because when a charging session "fails", the handle has not been touched.

I didn't clearly explain the order of events.  A session goes like this:

The EVSE remains plugged into the garage wall (NEMA 14-50) from the last charging session

I plug the J-1772 into the car

It starts charging the car (light blinking)

The handle is left undisturbed. 

Sometimes, when I check back later, the car has stopped charging (light not blinking)

I unplug the J-1772 from the car

I unplug the EVSE from the NEMA 14-50

I wait 10 seconds

I replug the EVSE into the NEMA 14-50

I replug the J-1772 into the car

It starts charging again (car light blinking)

It almost always then charges without further problems until the end of the session

I actually rarely charge at home, so this has gone on for many months, but probably less than 40 charging sessions.  I estimate that "failures" occur on about half of the sessions (I think I'll start charging more often at home so I can get a better handle on how often it happens).

On a recent "fail", I finally thought to look on my phone display and it said "Stuck Relay" (screenshot in original post)

Could it be a defective relay?