This 121866 Reznor part is built for the rigors of commercial and industrial environments

ensuring proper balance and reducing mechanical vibration that leads to premature motor bearing failure

ensuring proper Amp draw and preventing overheating

This indicates the switch isn't closing to prove safe airflow

This comprehensive kit includes the WRC23 ignitor

Burnham Boiler 109620-01 Valve THPU32HP7Y This 121866 Reznor part isThe Burnham Boiler 109620 01 Valve is a critical gas control component engineered for precise natural gas manifold pressure regulation between 0. 7" and 3. 5" W. C. This 1 2 inch NPT gas valve features a step opening characteristic, ensuring smooth ignition transitions and stable combustion across Burnham residential hydronic systems. As a direct OEM replacement valve for discontinued part numbers 81660145U and 81660282, it maintains the structural