Lennox 69M18 Pressure Switch 340155-7026 Designed to interface directly with

Designed to interface directly with PLC or BMS systems

you need a component that withstands the constant mechanical stress of commercial refrigeration environments

Always check your specific furnace wiring diagram and parts list to confirm the required temperature rating and reset type

and the necessary hardware to ensure a leak-free mechanical connection

System Versatility: Supports both direct acting and reverse acting pneumatic thermostat configurations

Lennox 69M18 Pressure Switch 340155-7026 Designed to interface directly withThe Lennox 69M18 Pressure Switch, also identified by part number 69M1801, is a critical safety component engineered for high pressure monitoring in professional HVACR applications. As a Lennox OEM replacement part, this high pressure cutout switch is factory calibrated to trigger a manual reset (M R) cutout at 640 PSI. This precise threshold is essential for protecting the compressor from catastrophic failure due to excessive discharge pressure,