When diagnosing furnace rollout or venting issues

making the 30041036-854 the correct OEM replacement part for these models

Safe Operation: Includes a built-in internal pressure interrupter to disconnect the circuit in the event of an electrical fault

Using the York S1-7670-3071 ensures that the original manufacturer timing specs are maintained

This round dual run capacitor integrates two separate capacitors into a single aluminum housing

McDonnell & Miller 324500 O-Ring When diagnosing furnace rollout orMaintain precise system pressure and eliminate leak paths with the McDonnell & Miller 324500 Tetraseal O Ring. This pack of five high performance seals is the engineered replacement for the discontinued 324435 part number, ensuring a direct fit without the need for field modifications. Designed as a critical boiler control replacement part, these o rings are specifically optimized for low water cut off (LWCO) and mechanical water feeder assemblies.