Lennox 64W86 Pressure Switch 320788-702 The Armstrong 811 features a

The Armstrong 811 features a small vent hole in the top of the bucket that allows air to escape and collect at the top of the trap for discharge

Enhanced Durability: Silver cadmium oxide contacts provide superior arc resistance and thermal stability

The Carrier 320074-701 Heater Element is a critical OEM replacement heating component designed for precision climate control in Carrier

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

Lennox 64W86 Pressure Switch 320788-702 The Armstrong 811 features aThe 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.