Dash A/C not working

[Patrol 65]

My dash a/c is not working at all. The blower fan does not work when the speed switch is turned, nor does the compressor because the clutch is not engaging on the compressor. The only thing that works on the a/c/heater switch is the vent which opens but no blower. I checked the 15 amp fuse for the blower motor and it is good. Could the problem be associated with the a/c system relay?

[Modela]

Nathan, I have a 1999 Fleetwood and couple years ago mine did the same thing. The problem with mine was a burnt wire in the wiring harness. If this is the case with yours, you will have a hard time trying to find it.
Good Luck Let me know Johnny

[Johndale]

On my 2003 f53 according to the owners manual in the engine compartment you have a master electrical box.Relay 4 is for the AC and fuse 2 is AC. But after going through the owners manual if you had an engine over temp it will shut that down and send signal to PCM telling it to stay off. It is on page 66 of the owners manual on my frame. Plus you have a low and high pressure switch too.