Quote:
Originally Posted by oldwinnie
Our coach is a diesel with a side radiator. The vacuum pump works correctly and operates the valve on the heater hoses. I will look for the gate valves. Thanks for your help
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There is an air actuator for your dash heater under the hood, at least in many Winnie '02 diesels, that the rubber hose often ages out and splits. That small vacuum hose goes around and connects on the back of the actuator and it's hard to see the split so it's often overlooked. I've seen several of them with the split (in Winnies of that era) so now if a friend has a dash air issue that's the first thing I check.
Wouldn't hurt to check your vacuum hoses under the hood while you're working on the system.