Starting late last week, I had a few charging failure with my "classic" P85 connected to the HPWC in our garage. Charging would stop with a "red ring" and an error message on the dashboard. Disconnecting and reconnecting the cable got the car charged the first time. On the second day when this happened, it appears one of chargers inside the car failed, because the HPWC would stop at 40A (instead of the full 80A that was configured). Charging would begin and then stop a few minutes later with a red ring & error message. I tried the UMC to a 14-50 outlet on the other side of the garage - and it saw the same problem - charging would go for a few minutes and then stop. I tried reducing the current setting - and while that stretched out the time before the charging stopped, charging still didn't go for more than 10 or 15 miles of range before stopping. Because I was seeing the same problem on UMC and HPWC, it appeared the problem was in the car, especially because one of the chargers didn't appear to be working. I dropped the car off at the service center this afternoon and brought home a loaner. To my surprise, the loaner is also having problems charging. Though a slightly different problem. I went out to the garage after the car had been on the charger for several hours. Charging had stopped early and there was a blue ring at the charging port, but no error on the dashboard. I unplugged and replugged the charging cable, and charging resumed - but only for a few minutes. Instead of stopping with the red ring error, every few minutes charging would stop for a few seconds, the current drops to zero, and then resumes charging again, ramping up to 40A (only a single charger in the car). Dropping the current to 30A results in the same problem. But unlike with my car, when the charging stops, it automatically resumes - at least during the time I was with the car in the garage tonight. Unfortunately the previous person who had the loaner didn't return the UMC, so I don't have a UMC to test with (and verify the problem with the loaner is only with the HPWC). I reported the problem to Tesla phone support, but they aren't seeing any errors, evidently they are only able to see an error if it is being displayed while you're on the phone. If the error is displayed and immediately cleared (which is what is happening with the loaner), they may not be able to see it - and it may take a local service center to dump the detailed logs to see what's happening. It appears my car had one of the two chargers fail. It's possible the failure was caused by the HPWC or when the charger failed, that damaged the HPWC. So getting everything working again may require replacing both the charging hardware in my P85 plus repairing/replacing the HPWC. Has anyone else seen anything like this???