Do I need to replace the keyways along with the shaft

The kit integrates a high-performance SEN00491 flame sensor and a 120V White-Rodgers 50A55-486 ignition control board

If the fan runs without heat

Extended Leadwires: 18-inch factory leads provide ample length for routing through junction boxes without the need for additional splicing

Laars Heating Systems RE0013000 Flow Switch Kit 322055-301 Do I need to replaceThe Laars Heating Systems RE0013000 Flow Switch Kit is a critical OEM replacement component designed for precision water flow monitoring in commercial and residential hydronic systems. This paddle type flow switch is a direct cross reference for the E0013000 and E0013100, ensuring full compatibility with a wide range of legacy and modern units, including Laars Mighty Therm, Mighty Max, and Pennant series. Engineered for both indoor and outdoor