whereas other models may use remote bulbs for immersion or surface mounting

How do I verify if the 4520-0015-000 is failing

Engineered specifically for Burnham residential boilers

This replacement ignition transformer is built with a rugged die-cast housing to withstand the high ambient temperatures found in boiler rooms

York S1-029-24481-000 Parts Package 326010-701 whereas other models may useThe York S1 029 24481 000 Parts Package is a critical OEM maintenance solution specifically engineered for TM9Y Series 95% AFUE 2 stage multi position gas furnaces. Designed for higher capacity units ranging from 100 130 MBH, this factory authorized kit contains the essential components required to restore factory spec combustion performance and pressure switch logic. Relying on genuine Source 1 replacement parts ensures seamless electrical and