Lennox 26W42 Pressure Switch 321042-401 Ensure your system's pressure and

Ensure your system's pressure and temperature requirements align with the valve's 1015 psi max rating

or if the unit is short cycling despite a clean filter

specifically designed to capture wax

While the switch itself can fail due to a ruptured diaphragm or pitted contacts

Lennox 26W42 Pressure Switch 321042-401 Ensure your system's pressure andThe 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