I normally charge my early 2015 Model S using the original-version 40A UMC that came with it. But, that one is out of commission for a while ever since the NEMA 14-50 outlet I had it plugged into melted down. At least it didn't catch on fire, quite, though it was only dumb luck that I happened to be home and notice the smell of smoke. The UMC itself appears undamaged and energizes when I plug it into a household outlet but I'm unwilling to reuse the 14-50 plug end that was in the line of fire. It has plastic melted all over it and charring on one of the pins where it was presumably arcing. I've ordered a new one but it won't arrive until Friday.
For that matter, I'm a bit concerned this could even happen, in general my experience has been that the car senses when something is even a little out of whack with the power it's plugged into and won't charge at all in such cases, I've experienced that when plugging into improperly-grounded household outlets at vacation rentals for example. But this time it kept happily drawing 40A long enough to straight-up melt the outlet. I'll post a pic later if I get a chance.
But that is all beside the point, or anyway just background, to my question. Since my UMC1 is on the shelf until I get my replacement plug, I'm using the UMC2 we got with my wife's Model 3. I've used it before successfully, but now when I plug it in to my Model S, I cannot for the life of me get it to latch. I hear the latch trying to engage and giving up. Since it's not latched, it won't dial the charge rate up to the full 32A, and I'm limping along with 16A charging. I'm pretty sure the latch is OK, since while I was waiting for the outlet to be fixed I was charging at the local Supercharger and that was fine.
My question, after all that, is whether failure-to-latch is a well known problem with a well known fix, and if so, what is it? TIA.
(As an aside, this is an interesting-to-me example of the single point of failure being different from what people assume it will be. I've participated in a number of discussions over the years where people say they're getting a backup UMC because they're afraid their UMC will break leaving them unable to charge. I had two UMCs... but my outlet broke.)
For that matter, I'm a bit concerned this could even happen, in general my experience has been that the car senses when something is even a little out of whack with the power it's plugged into and won't charge at all in such cases, I've experienced that when plugging into improperly-grounded household outlets at vacation rentals for example. But this time it kept happily drawing 40A long enough to straight-up melt the outlet. I'll post a pic later if I get a chance.
But that is all beside the point, or anyway just background, to my question. Since my UMC1 is on the shelf until I get my replacement plug, I'm using the UMC2 we got with my wife's Model 3. I've used it before successfully, but now when I plug it in to my Model S, I cannot for the life of me get it to latch. I hear the latch trying to engage and giving up. Since it's not latched, it won't dial the charge rate up to the full 32A, and I'm limping along with 16A charging. I'm pretty sure the latch is OK, since while I was waiting for the outlet to be fixed I was charging at the local Supercharger and that was fine.
My question, after all that, is whether failure-to-latch is a well known problem with a well known fix, and if so, what is it? TIA.
(As an aside, this is an interesting-to-me example of the single point of failure being different from what people assume it will be. I've participated in a number of discussions over the years where people say they're getting a backup UMC because they're afraid their UMC will break leaving them unable to charge. I had two UMCs... but my outlet broke.)