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Wallbox pulsar charger stopped charging my Model Y a week ago

I have been charging my car ever since I bought it exactly a year ago on a wallbox pulsar charger at home. Suddenly, a week ago it stopped working. It makes the usual noise it always makes and the "starting to charge" message shows up on the screen and within five seconds the car's display says "stopped charging." The light at the charging port turns from pulsing blue to red. When I look at my wallbox phone app it says "waiting for car demand." And when I check the car's display it says "Unable to AC charge -- Unplug and retry."

Frustrating. Wallbox asked me to check voltages between the different input terminals after removing the face plate. I called my electrician and had him check it out and it is 120 V between each of the terminals labeled L1 and Ground and L2 and Ground, and 240 V between the terminals labeled L1 and L2, exactly as it should be according to an email Wallbox sent me.

Another piece of info -- this weekend my daughter brought her Nissan Leaf over and it's charging just fine on the same Wallbox equipment. The Tesla charges just fine at other charging locations -- e.g. on level 2 Chargepoint equipment at my work. Has anyone else had similar issues? Any advice on what to do? I am still on an email communication thread with Wallbox, but also want to see if there is some hive mind wisdom that'll emerge from Tesla owners here.
 
An update -- I finally took my car to the Tesla service center. Initially they gave me the run around and said everything was OK on a Level 1 and Level 2 charger, but then came back and said it gave them some kind of alert when they were running some diagnostics in Level 3 charging mode. Long story short, they replaced my charge port (under warranty of course), and everything is back to normal. The Wallbox at home now charges the car. Hopefully this problem won't recur.
 

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