The Safari Motor Home had a ITR hurricane heater runs on diesel fuel, this system also control the A/C units. The Hurricane system had a controller board that would not turn on. Therefore neither the A/C or heating system was functioning. This presentation shows how to diagnosis of the system, repair the controller board and shows how to make an alternative to the expensive brushes in the ITR March re-circulation pump.
Here are links to ITR’s Technical bulletins on the Hurricane Heater https://itrheat.com/hurricane-heating-systems/
These are excellent videos on how to do every aspect of maintenance on the heating system.