jamesvpVT

Hi everyone - my first post (have gotten lots of neat tips and tricks from here in the past). I have a 2001 OBW Ltd and now that it's (finally) warm up here in the great white north, I am noticing a "hooting" sound from the engine compartment. It only happens with the A/C on, and only after 10 or 15 minutes of use. We've gotten to calling our OBW the Beluga (like the whale), 'cause that's really what it sounds like. Anyone got any ideas? Should I be worried? jvpiii