After spending a week in Charleston, SC and headed south toward the Mobile Oyster Fest, we're cruising nicely along I-95 when I decide to switch on the bus air.

Everything appeared to be fine, cold air, etc. when the "AC HI Pressure" warning light came on. This happened 5 to 10 minutes after turning it on.

We've been using the bus air without a problem all along the last 6,000 miles or so, and as recently as a week ago.

Shut off the AC for the remainder of the day until we got to our next stop where I turned it back on to see if the problem would duplicate itself. Ran the bus AC for about 10 minutes while we were waiting and the warning didn't re-appear. May not have been running long enough to duplicate conditions?

Anyway, is there something that I should be checking to determine if there is, in fact a problem? Assuming there is, is this a major project to get into?

I have zero experience with this....