Ray,

I have used the Cruisairs running down the road, but they don't function very well. They blow plenty cold air sitting still, but I think Jon is right about the heat and the lack of airflow across the condenser coils.

I had a near similar thing happen at the end of our last trip. Everything was going fine, bus had been humming along lulling me into a sense of false security when the OTR AC fault light came on. I knew what it was and pulled over to reset the condenser blower motor circuit breaker. This scene was replayed several times during the day, but the frustration was still the same.