Since these are siphon nozzles

the internal bimetal disc may have failed after excessive cycling

Rotation Direction: Clockwise Lead End (CWLE) configuration to align with original fan blade pitch

The Heil Quaker ICP 1186509 Fan Blade is a critical OEM replacement component engineered for high-performance HVAC condenser applications

Fasco 50747-D500 Vent Assembly 318820-201 Since these are siphon nozzlesThe Fasco 50747 D500 Vent Assembly is a high performance centrifugal blower designed for critical draft inducer applications in furnaces, water heaters, and pellet stoves. Engineered for 115V operation, this single speed unit features a shaded pole motor that delivers approximately 60 CFM at a rated 3000 3200 RPM. As a frequent HVAC replacement part for diverse internal OEM componentsincluding references such as 7021 2373 and 7021 4735it offers a drop