Description
This is a BRAND NEW Tridelta Gas Furnace Air Pressure Switch. The Part #s include FS4066-78 SWT0900 & 20537-003. It has two wiring terminals and one hose port.
Function:
An air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.
Replaces Old Part #s:
20537-003 FS4066-78 SWT0900
Repair Difficulty Level:
Partial List of Units that Use This Item:
Hit Ctrl+F and enter your model number for a quick search!