Thanks for the video, good explanation, hpwever I think it's a major design fault. No user should get to a point where he has to take down the entire unit to the motor. This seems to be inherent in Eufy's design.
I didn't exactly what you did and it still beeps. I winder if a person can purchase the sensors? My warranty of course ran out last month and the company wants me to send it to them at the cost of 61 dollars.
Sorry for the confusion. I actually had both the 3 and 4 beep issues. I had already fixed the 4 Beep issue before I made the video. This video deals with how to fix both. 4 Beep fix @ 4:40 and 3 Beep fix @ 5:16.