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the Lennox 42J03 ensures that your heating equipment operates within manufacturer-specified safety parameters
Can this be used on R-410A systems
Key Benefits Adjustable Range: Precise
Can I use this for liquid line applications
McDonnell & Miller 304300 Snap Switch Els PW 17895 the Lennox 42J03 ensures thatThe 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
