Lennox 69M18 Hi-Pressure 640# Manual Reset Cutout Switch

Description

Lennox 69M18 Hi-Pressure 640# Manual Reset Cutout

The Lennox 69M18 is a high-pressure safety cutout switch engineered to protect HVAC and refrigeration compressors from potentially damaging high-side pressure conditions. With a 640 PSI cutout setpoint and a manual reset (M/R) design, this control ensures that the system cannot automatically restart after a high-pressure trip event — requiring a technician to diagnose and clear the fault before resuming operation. This safety-first approach helps prevent compressor damage, refrigerant leaks, and costly system failures.

Key Features

• 640 PSI high-pressure cutout setpoint for precise system protection
• Manual reset (M/R) design requires deliberate technician intervention before restart
• Engineered as a genuine Lennox OEM replacement part (SKU: 69M18)
• Protects compressors and refrigerant circuits from dangerous pressure excursions
• Designed for compatibility with Lennox HVAC and refrigeration equipment

Why Manual Reset Matters

Unlike automatic-reset pressure controls, a manual reset cutout prevents nuisance cycling and forces a proper service inspection after a high-pressure event. This is critical for identifying root causes such as refrigerant overcharge, condenser blockage, or airflow restrictions — protecting both equipment and personnel.

Application

• Lennox commercial and residential HVAC systems
• Refrigeration compressor high-side protection
• OEM replacement for systems originally equipped with the 69M18 cutout

Ordering Information

• Brand: Lennox
• SKU / Part Number: 69M18
• Type: High-Pressure Cutout Switch
• Cutout Pressure: 640 PSI
• Reset Type: Manual Reset (M/R)