Lennox 26W42 Pressure Switch 321042-401 When performing a Honeywell L4008A1015

When performing a Honeywell L4008A1015 replacement

or if the unit is short cycling despite a clean filter

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

range allows for precise tuning across various differential pressure requirements

Lennox 26W42 Pressure Switch 321042-401 When performing a Honeywell L4008A1015The 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