OEM Honeywell Trane Air Pressure Switch IS20428-6009 Canada 

OEM Trane Gas Furnace Air Pressure Switch. TheTrane Part # is SWT03254 or SWT3254 (Honeywell # IS20428-6009). It is rated at 1.65" W/C with 2 witing terminals and 2 hose ports. It works on many Trane furnaces. 

List of Trane Furnaces that use this Air Switch:

AUH1C100A9481AA AUH1C100A9H41AA AUX1C080A9601AB AUX1C080A9601AC M951P100CU48AAA TUH1C100A9481AA TUH1C100A9H41AA TUX1C080A9601AB TUX1C080A9601AC