E-450 Stuck on Defrost Mode
I suddenly have cold air coming through defrost vents only, not through dash vents. Defective parts are buried behind firewall on engine side, not accessible without much complicated disassembly. A n...
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The actuator is not the problem, it's a broken rubber vacuum line down behind the engine not easy to get to without a lot of disassembly, much easier to rig a bypass vacuum line per various You Tube videos.
