Hi,
Wow, I did hear it. It sounds like a power steering pump. I know it only happens when the A/C is on, but that is also when there is added load on the belt. Don't laugh but pay attention to see if it is happening when turning.
I'm going to ask the site owner if he ever heard that type of sound from the A/C. He is from CA and excellent with A/C systems.
Let me know about the PS.
Joe
Friday, June 30th, 2023 AT 9:37 PM