I had problems with my furnace (4yrsold), it would not light. If you took the cover off the sealed burner unit, it was fine. The intake amd exhaust (direct vent) are clear. If you blow into one of the rubber tubes that goes to the sensor switch it woll also light(burner sealed). My question is about the technicians solution. He took out a rubber diaphram under the sealed burner unit to allow air intake from inside the house. Is the ok? Or is it just a bandaid solution? I have a furnace insurance program so the repairs are free. Just want to know why he would remove somthing that was originally install at the factory. Also what could be another cause for the problem?