As a high-performance HVAC draft inducer switch

The 1 3/8-inch height and lightweight build ensure a balanced rotation that prevents premature inducer motor bearing failure and reduces vibration noise during the heating cycle

preventing burner ignition and ensuring safe equipment operation

often causing heavy creosote buildup in the chimney due to low return temperatures

Reliable Signal Transfer: Gold-flash contacts prevent oxidation

Lochinvar & A.O. Smith 100208375 Pressure Switch 30067439-890 As a high-performance HVAC draftFor veteran contractors looking for a reliable replacement on Lochinvar and A. O. Smith units, the Lochinvar & A. O. Smith 100208375 Pressure Switch is the direct OEM solution for maintaining precise combustion safety. This dual pressure switch is engineered to monitor critical draft inducer performance, featuring factory set trip points of Hi 1. 06" WC and Lo 0. 75" WC. As a critical safety component, it ensures the venting system is clear and the