Lennox 49L90 Pressure Switch Always check your supply voltage

Always check your supply voltage before wiring to avoid burning out the primary coil

Engineered for seamless HVAC troubleshooting

this is a lower thermostat (SPST) specifically designed for the bottom element

54" WC setpoint prevents compatibility issues and ensures system safety parameters are met

Whether you are performing a pneumatic thermostat replacement or finishing a new HVAC building automation project

Lennox 49L90 Pressure Switch Always check your supply voltageEnsure reliable combustion safety and system performance with the Lennox 49L90 Pressure Switch. This genuine OEM component, which is a direct replacement for Lennox 49L9001 and Honeywell IS20100 3072, is engineered specifically for Lennox furnace pressure switch applications requiring a precise . 47" WC (water column) trip point. Featuring a 1 4" barb connection for secure pneumatic hosing and a single pole single throw (SPST) configuration, this