Heating and Ac in Dash not operating

[JBD]

I have a 2008 Monaco Cayman 39pbt. Our heating / Ac system in the dash is not operating. I have replaced the main switch and fuses in the side compartment and still no luck. I would like to get my hands on a wiring diagram to better understand the systems operation. I have called Monaco Support and they had no information but recommended I go to NWRVsupply.com Which I did and they also didn't anything for my unit. Would anybody happen to know where I may obtain one?

[TonyMac]

What is it not doing? Not heating? Not cooling? Neither heating nor cooling? Not blowing? No directing the air where you want? Not any of the above?

[JBD]

We have no fan operation at all.

[TonyMac]

The fan has a fuse somewhere; mine is in the DC panel in the compartment under the driver's seat. The cover to this panel poorly describes the fuses therein, however, I had to test every fuse to find the blown one that controlled my vac pump. Start there. Can you test fuses with a circuit tester, a small stool, and a 6-pack?

[Tax_Man]

I had the same thing happen in my toad. They replaced resistors and it works... Something to think about.

[JBD]

Well after taking half the dash out tracing wires we identified a defective relay in the panel in the side compartment. The system is now working.
Thank you for the suggestions