Pay in 4 interest-free payments of $35.38 Learn more
Ships within 48 hours · Estimated delivery Sep 4 - Sep 9
Full Functionality: Restores complete access to Celsius/Fahrenheit switching
This kit is the specific McDonnell & Miller 421-30 replacement part for any Series 25A
this specific assembly includes the auto-reset switch and the corresponding mounting bracket for standard NPT installations
Key Benefits Direct OEM Compatibility: Serves as a 1:1 drop-in replacement for the 18K4401
Reznor 193811 Pressure Switch 318423-701 Full Functionality: Restores complete accessThe Reznor 193811 Pressure Switch is a critical safety component engineered for precision monitoring of combustion air and venting pressures in commercial and industrial heating systems. As a genuine Reznor OEM pressure switch, it features a Single Pole Double Throw (SPDT) configuration, allowing for versatile control of both normally open and normally closed circuits depending on the system's differential requirements. This specific model is equipped
US$ 22.99
US$ 23.10
US$ 44.10