Lochinvar & A.O. Smith 100217965 Pressure Switch 321702-401 this is a brand-specific Carrier

this is a brand-specific Carrier HVAC part

and Day & Night units

The 1/2" x 3" single-flat shaft is paired with double-sealed ball bearings and automatic thermal overload protection

the assembly includes a rigid thermoplastic conduit box with a 1/2-14 NPT female thread

Its robust construction ensures reliable cycling in demanding mechanical rooms and process cooling applications

Lochinvar & A.O. Smith 100217965 Pressure Switch 321702-401 this is a brand-specific CarrierThe Lochinvar & A. O. Smith 100217965 Pressure Switch is a critical safety component designed for precise monitoring of the combustion air sequence in high efficiency water heaters and boilers. This 2. 3" WC blocked inlet pressure switch functions as a normally open contact that closes when the inducer fan generates the required negative pressure, ensuring the venting system is clear of obstructions before ignition. Engineered for compatibility with