I need help ... there is a loud whistle in my bus...

[orbitalsolutions]

--- In WanderlodgeForum@yahoogroups.com, "orbitalsolutions"
wrote:
>
> I went into my bus this morning and there is a loud whistleing
type
> sound coming from the front otf the coach. sounds like an alarm.
>
> I have no idea what this is. on the closet wall there is a tester
> paned for propane, but it is not that. I turned off the 12 volt
master
> and the whistle remains.
>
> Does anyone know what this might be, it's quite annoying, and I
havn't
> been able to locate the source of the sound yet.
>
> Thanks.
>
> --James
>Oh yeah, I have a 1978 FC33 in Las Vegas NV