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.

Looks like you need one of these.

New Upgraded Factory Replacement Part 398AAW Pressure Switch Replacement Kit. 3 Wires 2 Hoses (BDP: American HVAC Parts (http://americanhvacparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=PRS312829A&Category_Code=ps)

Looks like you need one of these.

New Upgraded Factory Replacement Part 398AAW Pressure Switch Replacement Kit. 3 Wires 2 Hoses (BDP: American HVAC Parts (http://americanhvacparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=PRS312829A&Category_Code=ps)

Thank you for the help. I'll replace with updated part, and hope it works.