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For mid-to-high efficiency hydronic systems
as it monitors for flame rollout or excessive heat buildup near the combustion chamber
eliminating guesswork during service calls
As a genuine Source 1 OEM replacement part
018" orifice for propane will result in over-firing and a dangerous pilot flame
York S1-025-30394-700 Fusible Link For mid-to-high efficiency hydronic systemsThe York S1 025 30394 700 Fusible Link is a critical safety component designed for precise thermal protection in residential and commercial gas furnace applications. As a genuine Source 1 OEM replacement part, this high limit safety switch is engineered to interrupt the electrical circuit if internal temperatures exceed safe operating parameters. Field technicians often refer to this as a furnace roll out limit, as it monitors for flame rollout or
