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Does this fit older Reznor unit heaters
this OEM replacement part ensures the burner circuit opens if the heat exchanger exceeds safe operating parameters
Direct replacement for part R604221-01
Durable Construction: High-grade insulation protects against abrasion and heat degradation in the burner compartment
While universal models exist
Raypak 600892B Switch Does this fit older ReznorThe Raypak 600892B is a critical 135F CO Auto Reset Switch designed for precise thermal regulation within Raypak boiler and heater assemblies. This high limit switch functions as a primary safety component, monitoring water temperature and automatically resetting once the system cools below the 135 degree Fahrenheit threshold. Engineered for durability in high demand hydronic applications, this replacement thermal switch ensures the burner circuit