this heavy-duty gauge set is built for high-performance thermal environments

provided the threading matches your specific liquid line assembly

which may cause the compressor to stall or fail over time

ensuring reliable shut-off against high differential pressures

Lennox 26W42 Pressure Switch 30067439-890 this heavy-duty gauge set isThe Lennox 26W42 Pressure Switch is a critical OEM component designed for high efficiency two stage furnace operation. Engineered to monitor and regulate inducer motor performance, this switch features precise dual factory set points of 0. 55" W. C. (Low) and 0. 95" W. C. (High). As a veteran grade HVAC replacement part, it ensures the sequence of operation is maintained by verifying proper vacuum pressure before allowing the ignition process to