offering consistent performance in temperature ranges from -4°F to 131°F

repeatable timing for critical combustion sequences

this pilot-operated valve ensures reliable flow control for air

Common Questions Is this board compatible with 2-stage furnaces

This SPST open-high pressure switch operates within a range of 20 to 100 psi

Lochinvar & A.O. Smith 100073333 Kit 322838-752 offering consistent performance in temperatureThe Lochinvar & A. O. Smith 100073333 Kit is a specialized FTX HI LOW PRESSURE SWITCH KIT engineered for precise gas pressure monitoring in FTX600 850 heating systems. This OEM certified kit includes both high gas pressure switch and low gas pressure switch components, providing a critical failsafe to protect the boiler heat exchanger and combustion assembly from erratic supply pressures. Featuring a manual reset mechanism, the 100073333 ensures that