This specific relay is typically utilized in RSIR (Resistive Start Inductive Run) setups

How do I handle the unused primary taps

Zero Differential Operation: As a direct-acting valve

Inspect the burner for heavy rust

the internal bimetal disc has likely failed and requires immediate replacement

Heil Quaker ICP 1172228 Transition Assembly Els PW 17895 This specific relay is typicallyThe Heil Quaker ICP 1172228 Transition Assembly is a critical OEM component engineered for high efficiency 90+ gas furnace systems. As a veteran grade furnace exhaust transition, this part is specifically designed to facilitate the seamless flow of flue gases between the heat exchanger and the inducer motor. Integrated into RPJ3, MPD75, and 9MPT furnace models, this assembly maintains the structural integrity of the combustion path, preventing leaks