Lennox 64W86 Pressure Switch 320788-702 This 3-inch nickel-plated probe provides

This 3-inch nickel-plated probe provides a passive resistance output

Extended Leadwires: Pre-stripped 18-inch leads provide additional slack for flexible wiring in tight mechanical Room configurations

it manages the air-gas ratio with the tight tolerances required by modulating condensing boilers to maximize AFUE ratings

2 Cv rating ensures optimal flow management for terminal unit applications like perimeter radiation

Lennox 64W86 Pressure Switch 320788-702 This 3-inch nickel-plated probe providesThe Lennox 64W86 Pressure Switch is a critical safety component engineered specifically for two stage gas furnaces. This factory authorized replacement operates as an air pressure sensor, monitoring differential pressure to ensure proper inducer motor performance and venting before allowing the ignition sequence. Designed for high efficiency systems, it features a dual level calibration with a set point high of 1. 20" W. C. and a set point low of 0.