Loud charging hum is finally gone!

[bighair]

I have a 2021 Mach E Premium AWD SR that I was lucky enough to stumble into at a dealer last summer (built in April 2021, delivered in July). Love the car, but one of the things that surprised me was how much noise the car makes when charged, regardless of L1, L2, or DC Fast Charge. Under all of those circumstances, I had the somewhat high pitched, surprisingly audible humming sound coming from the car when plugged in. Having owned a different EV as well as PHEV, it was pretty surprising from the first day I brought it home.

Got my car back last week from the dealership after they did the recall service for re-gluing the moonroof and windshield (in and of itself a little alarming), and getting it back after all of the dealer installed software updates, I've noticed two differences: (1) I definitely now have much faster DC fast charging after the 80% threshold, and (2) NO MORE HUMMING NOISE WHILE CHARGING! Woo hoo!

Good to see that this was an adjustment that could be made by software update. But it is very weird to me that the OTA updates seem to be so different than what the dealer can install through their hardwired forced update. I was "up to date" with all of the OTA action. To me, reconciling this difference is a huge area that Ford needs to focus on ASAP. The difference between OTA "updated" and Dealer hardwire "updated" makes absolutely no sense.

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[EddieHaskell]

I just got mine back yesterday for the same glass recalls. Since my MME got stuck in the middle of an upgrade to 1.7.1 last fall, they applied the latest updates to bring it current. (They told me it took over 20 hours)

But I noticed this morning that the charging "hum" is gone. And like you, it didn't matter if I was plugged into a 120v outlet at L1, my 40amp/240v L2 or DC Fast Charging there was always the humming.

So I was a little concerned when my PulsarPlus showed it charging at 9.6KW, but no hum. It reported a good charge and stopped at 90% in total silence. I'll be curious to see if the hum comes back in warmer weather (it's only 36°F here today...)

I'm glad to see you made this post, thanks!