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you will need appropriate reducers or to verify if the 1/2" variant of the 36H series is required for your specific BTU load
or diagnostic LEDs on the main board indicating a communication error
The 121L3277 is the official Danfoss replacement for the discontinued 120U3277
The unit utilizes standard terminal markings
Lochinvar & A.O. Smith 100275562 Ignitor Kit 320074-702 you will need appropriate reducersThe Lochinvar & A. O. Smith 100275562 Ignitor Kit is a critical OEM replacement component designed to restore reliable ignition in high efficiency gas fired systems. This complete boiler ignitor replacement kit includes the 100275562 ignitor, a high temperature burner gasket, and necessary mounting screws for a precise, airtight seal. Built for heavy duty commercial and residential applications, this kit is the direct OEM ignition part for Lochinvar
