Amana GUC090B35B natural gas furnace installed.
Strong, gusty 45mph winds typical for Fall here have been messing with induced draft blower vacuum signal to the pressure switch, especially the cyclonic nature of said winds this year.
Shuts the furnace down prematurely when alternating positive/negative pressure waves in the flue mess with the blower vacuum signal to pressure switch pintle from gusts blasting across the furnace exhaust flue outlet above the roofline. Pressure switch tests prove no diaphram rupture, microswitch function ok. Flue terminates approximately 22 feet above the ground, through the garage roof, along the split level exterior wall, through the adjacent eave of the attached main house terminating about 3 feet above the roofline with a typical rain cap. Exhaust PVC is 2.5 inch diameter.
Tonight it’s calm here for the first time in 4 days and the furnace is completing heating cycles normally. What can be done to keep gusts from creating pressure waves down the flue or wind-capping the flue ?