PolCat-76-Avion wrote:
New member here! Just joined the rv.net site. We recently bought a 1976 Dodge Avion 22 foot rv. MB400 chassis 440 engine. It is in really good shape except that a previous owner painted it with a brush.
Now that it is getting colder I tried to slide the temperature selector to heat but nothing happened. The wire was disconnected from the valve in the heater hose. The valve does work the cable doesn't move. How do I get to the back of the heater control part of the dash?
Great looking rig! In order to have easy access to the cable, you have to remove center portion of the dash. In my case I was lucky, because our MB300 was not ordered with factory A/C; Monaco installed an aftermarket unit from ARA that was self-contained in a plastic housing....removing the housing gave me full access to the heater components, which was nice because the ducts were completely rotted.
My cable was frozen too, but in my case it was the valve that sits on the heater core that was completely rusted up. If your valve is in good shape, take care of it, because IF you can get a new one, you're going to pay through the nose for it. I was able to find a NOS unit, but it set me back $125.
What I would do is disconnect the cable at the valve and try sliding it back and forth to free it. Shoot some WD-40 into the cable sheath and slide it some more. That should take care of your problem.
Good luck.
