Carrier HH18HA450 Switch 328140-751 Smith 100074672 Manifold Assembly is

Smith 100074672 Manifold Assembly is a critical OEM replacement component for high-efficiency natural gas tankless water heaters

By maintaining the correct pilot-to-main burner relationship

Durable Construction: Built to withstand the high-temperature environments of inducer motor housings without calibration drift

this motor is specifically designed for the V8043D series

Carrier HH18HA450 Switch 328140-751 Smith 100074672 Manifold Assembly isThe Carrier HH18HA450 is a high precision temperature actuation switch designed for critical thermal monitoring in residential and commercial HVAC applications. As an OEM limit switch, this component serves as a fundamental safety primary, effectively preventing heat exchanger damage by breaking the electrical circuit if internal temperatures exceed factory set safety thresholds. Engineered by United Technologies, the HH18HA450 switch features a