Haha, true true. I just try and not offend repair people as it's their line of work, I'm no HVAC expert so I don't want to tell them how to do their job either. Funny enough, today I didn't see him try a manometer at all, he simply replaced both switches with new ones (one of them looks like a different model altogether) and so far, knock on wood, things are running perfectly. We'll see how it goes over the weekend though, it's worked this long before and then broken again. I did ask to keep all the old parts in case it didn't fix it, so they could be put back and the new parts returned.