Most definitely plug any hose you are not using. In your diagram that you drew, you have a part that says "This is not moving", and then the white hose you say used to go to the heater shut-off valve is just laying there open...that's a big leak in that circuit, which explains why the part that does not move is not moving.
Also, ANY leak in the vac system is gunna cause a problem, so be sure you plug any hoses not being used. Sometimes it also helps to block off certain items in the system to determine if other parts of the system will work. If you block one valve, and the rest of the stuff starts working, then you know you have a leak in that one circuit.
And...you say the switch is one you bought new two years ago. It's possible the switch has dried out, and will no longer properly seal the circuits. I've seen even new ones off the shelf that dint work, so new don't mean it's good. Just food for thought....
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Joel Adams
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