The pump runs one way to create vac. to close the locks etc and runs the other way, to make air pressure to open things. Why would a leak in the system cause the pump to cycle? Is there some parts of CLS that need continuous vac.?? I understand it is independent from the other vac, systems because of this bi-rotaional function. Sounds like a neat system...until it SNAFU's. Any insight would be great!