Rheem-Ruud 70-21858-12K Fan Blade Els PW 17895 it breaks the circuit to

it breaks the circuit to the gas valve as a safety measure while keeping the fan energized to cool the heat exchanger

and many other HFC/HCFC blends

corrosion-resistant polymers

Installing a switch with a different water column rating can bypass safety protocols or cause the furnace to short cycle

Rheem-Ruud 70-21858-12K Fan Blade Els PW 17895 it breaks the circuit toThe Rheem Ruud 70 21858 12K Fan Blade is a genuine OEM condenser fan blade designed to restore proper airflow and heat transfer in compatible Rheem and Ruud outdoor condensing units. This 18 inch fan blade features a 27 degree blade pitch, 1 2 inch bore, counterclockwise (CCW) rotation, and a durable 2 blade design to provide balanced airflow and efficient condenser performance. Built to factory specifications, this replacement fan blade helps