Bryant furnace Main Burner Doesn't Light
I have a Bryant Plus 90 furnace, model 398AAW036080D , series G. The draft inducer and pilot light go on, but the main burner doesn't light. While tapping on pressure switch with a screwdriver handle the main burner ignited. The switch is attached to a rubber diaphram. It has a yellow, orange, and brown wire attached to switch, and an inlet and outlet hose attached to diaphram. I am curious if this switch/diaphram assembly would solve my problem if replaced. I would also like to know how this works in activating the main burner. Thank you for any assistance.
