Originally Posted by Gilly

Agreed on the tissue test, but won't positively tell you if the little motor is noisy.
I've just worked on the automatic climate cars, I wouldn't have thought a non-automatic climate car would need the temp sensor, if it's using that, then a non-automatic climate car must be somewhat automatic? You are describing what the automatic system does. One would think a non-automatic car would be say like an old pickup, the dial on the dash (or lever) just opens and closes the valve and the driver decides when to open or close it and how far open.
Gilly