McDonnell & Miller 354001 Switch 321894-706 it is essential to verify

it is essential to verify the specific control harness and tap settings for your Trane or American Standard air handler or furnace

this SPNO SPNC relay provides consistent switching performance and reliable operation in commercial and residential systems

replacing a faulty defrost board is the standard solution

linear control in modulating applications

installing this factory-authorized component is essential for maintaining the static pressure balance and operational integrity of Carrier

McDonnell & Miller 354001 Switch 321894-706 it is essential to verifyThe McDonnell & Miller 354001 is a professional grade E 11M 24V 2 SPST M R Switch engineered for critical low water cut off (LWCO) applications in residential and commercial boiler systems. This manual reset switch (M R) provides high reliability safety by latching open during a low water condition, requiring a technician to physically depress the reset button only after the proper water level has been restored. Built for durability in demanding