checking the MFD rating of the existing capacitor with a multimeter is the first step

The 314100 is the dedicated service part for the MP909A Series

While this is an OEM York part

the SR3B-05 is an 11-pin relay socket designed for 3-pole relays

preserving system static pressure and protecting sensitive boiler replacement parts from heat degradation

White Rodgers 767A-374 Hot Surface Ignitor checking the MFD rating ofWhen you're out on a service call and finding a cracked element or high resistance on a gas fired furnace, the White Rodgers 767A 374 Hot Surface Ignitor is the direct professional grade replacement you need. This silicon carbide furnace igniter is engineered for a 120V AC power supply and delivers the rapid heating necessary for reliable burner ignition across various 15, 17, or 45 second hot surface ignition systems. As a critical HVAC replacement