reusing a worn gasket risks gas leaks and "rumbling" combustion due to air infiltration

This switch mounts directly to the burner box

To maintain the UL certification and safety profile of the furnace

018" diameter aperture

and mineral oils

White-Rodgers 90-291Q Fan Relay reusing a worn gasket risksThe White Rodgers 90 291Q is a technical grade HVAC fan relay designed for switching single or two speed fan motors, solenoids, and resistive loads in commercial and residential systems. As a Type 84 enclosed relay, it features a Single Pole Normally Open (SPNO) configuration, making it a standard choice for 120V fan relay replacements where reliability is non negotiable. The 120V AC coil operates at a nominal 25 mA with a DC resistance of 2,000 Ohms,