Air Warning Buzzer

[Tom Fisher]

There is a buzzer type noise in the rear of the coach. When I start the coach, the air pressures for both tanks build up properly as noted by the gauge. There has always been a lower buzzer type signal, coming from the rear of the coach, for the first few minutes of engine operation. The last time I fired it , I drove 5 miles and had a Dynomometer test, drove back home, and the buzzer type noise was still there. I wear hearing aids so I was not able to track down exactly where the sound was coming from. I would appreciate any comments that might help me isolate the buzzer sound, prior to taking it to a mechanic for them to hunt for the source.
Thank you
Tom
2005 Beaver Monterey
c-9 400HP

[Steve Huber Co-Admin]

Tom,
I'm not sure where your aux air compressor (for leveling) is located but it could be the source.
Steve

[David T. Richelderfer]

This may be a shot in the dark, but our coach has a loud back up alarm when in reverse.  I can't hear it from the pilot's seat but Leslie tells me it is LOUD.  Another shot in the dark is the carbon dioxide sensor on the bedroom ceiling (I think that's what it is).