Never do this when installing a 90 gas furnace failed heat exchanger tripping rollout switch hvac Furnace Rollout
The secondary heat exchanger is likely plugged. Common in this furnace, there was a class action lawsuit over it. Reset the roll out and carefully smell the Flame rollout ! Finding the cause. #nighthawkhvac #hvac #flamerollout#rollout #hvaclife #hvachacks How to jump or bypass pressure switch on a furnace. If a pressure switch is not jumpered correctly, the furnace will not turn on at ...