By replacing the internal mechanism with this OEM PCA kit

the switch may be stuck or triggering prematurely

The Heil Quaker ICP 1096047 Norton Ignitor is a critical replacement component engineered for high-performance ignition in Heil furnaces and ICP HVAC systems

and retighten the screw

The Trane WHL0740 Blower Wheel is a precision-engineered OEM replacement part designed for specific Trane and American Standard furnace and air handler assemblies

Raypak 004879F Gas Valve Els PW 17895 By replacing the internal mechanismThe Raypak 004879F Gas Valve is a critical combustion component designed for precise fuel regulation in high efficiency pool and spa heaters. Operating on a 24V AC intermittent ignition system, this valve is factory set for 4" WC natural gas but can be field converted with the appropriate regulator spring kit. Utilizing 3 4" NPT inlet and outlet ports, it provides high capacity flow rates necessary for large BTU inputs without excessive pressure