Lochinvar & A.O. Smith 100289391 Pressure Switch Els PW 17895 The Carrier 320788-703 Blower Housing

The Carrier 320788-703 Blower Housing is a critical OEM replacement part designed for high-performance residential and commercial HVAC systems

while SM110-4VI often refers to the ordering code for the same 400-460V 3-phase unit

Featuring 1/4" ODF sweat connections

For safety and reliability

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Lochinvar & A.O. Smith 100289391 Pressure Switch Els PW 17895 The Carrier 320788-703 Blower HousingThe Lochinvar & A. O. Smith 100289391 Pressure Switch is a critical safety component engineered for high efficiency condensing water heaters and commercial boilers. Calibrated to a 0. 55" WC (Water Column) set point, this direct replacement for 100294588 monitors the induced draft blower to ensure proper venting of combustion gases. In the field, this switch is the primary defense against blocked flue conditions and inducer motor failure, preventing