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

Designed to interface directly with PLC or BMS systems

no continuity indicates a failed or tripped open circuit

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

Simplified Install: Features standard male spade terminals for quick wiring to the control board

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,