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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
Key Benefits Direct OEM Compatibility: Serves as a 1:1 drop-in replacement for the 18K4401
This kit is the specific McDonnell & Miller 421-30 replacement part for any Series 25A
Full Functionality: Restores complete access to Celsius/Fahrenheit switching
Is this part compatible with other air handler brands
Reznor 193811 Pressure Switch 318423-701 Key Benefits Direct OEM Compatibility:The 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