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Key Benefits Universal Compatibility: Direct replacement for MARS 64 and 90-64
extending the operational life of the HVAC control transformer
Can this be used on R-410A systems
Can I use this for liquid line applications
McDonnell & Miller 304300 Snap Switch Els PW 17895 Key Benefits Universal Compatibility: DirectThe McDonnell & Miller 304300, also identified as the FS1 17 Snap Switch Assembly, is the critical single pole, double throw (SPDT) replacement component designed for Series FS1, FS4 3D, FS5, FS6, and AFE 1 liquid flow switches. This industrial grade switch is engineered specifically for high sensitivity applications in hydronic heating and HVAC systems where detecting low or moderate flow rates is vital for system protection. As an OEM replacement