P1S emits a tone when heating bed

[PrinterMcgee]

You’re very welcome. When I read your post I remembered one very similar from a few days ago.

A1 Beeping at the start of a print

Ever notice that once you post an issue on the forum, the cause of the issue becomes apparent and you feel silly for posting in the first place? Well, that has just happened to me. The cause of the beep was my UPS, not the A1. The UPS is tucked under my desk and not easily seen. I just happened to be in a position to see it when I turned on some lights that are connected to the UPS’s surge ports and the beep happened. The UPS also had a flashing light while the beeping was occur…