Has anyone ever had the problem of Dover Oil coming into your home to do "yearly maintenance" (a product you pay for) on a perfectly running furnace, only to acquire problems immediately after their so called "maintenance"? By this I mean, all is well until they perform their check and clean process, then you wind up with no heat, no hot water? This is what happened to me...more than once. Of course, then one must make a call to have them fix the problem. At this point the problem is suddenly a costly one, and you wind up... read full review »