Thanks everyone!
- Tried swapping line on canister...same result. It's a new repo
--Compressed air? should I have to do that?
- Don't have a stethoscope but don't hear any leaks. when the last switch went bad you could hear it under the dash. But I'll go get one
- swapped line around, same. with the door "closed" if I help it up a bit it opens but will not work by itself

I appreciate everyone's time!