Yahoo Message Number: 73584 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/73584)
Ken,
Put a thermometer in one of the vents to see it the ac air gets warmer as you drive or if you may have air leaks around the front of the coach, letting outside air in when driving. This has been a common problem in the past. Around the steering column, where lines and such come thru the front and floor.
Mikee