Lennox 26W42 Pressure Switch 321042-401 What is the difference between

What is the difference between the 159S and the 150S series

or if the unit is short cycling despite a clean filter

specifically designed to capture wax

Engineered as a 120V to 24V step-down transformer

Lennox 26W42 Pressure Switch 321042-401 What is the difference betweenThe 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