My home central heating unit won't light reliably. I can unplug the hose and reconnect it while it's trying to light and it will usually start. I checked the vacuum switch with a mighty vac and it won't hold. Each pump on the handle returns to zero immediately. Is the diaphragm broken, or are they designed to leak down that quickly?

Randy M, March 2009

I guess I get to answer my own question. The switch won't hold a vacuum. I ordered a new one and it acts the same way the old one did.

Randy M, April 2009