Lennox 97M59 Discharge Thermostat Coil SPST Opens 225°F Closes 180°F

The Lennox 97M59 (OEM part number 100503-02) is a discharge air thermostat coil designed to protect HVAC systems from overheating by monitoring discharge air temperature. This single-pole single-throw (SPST) temperature-activated switch opens at 225°F and closes at 180°F, providing critical safety control for furnaces, air handlers, and heat pump systems.

Key Features:

• SPST temperature-activated switch for discharge air monitoring
• Opens at 225°F to interrupt system operation when discharge air overheats
• Automatically resets and closes at 180°F when temperature normalizes
• Compatible with Lennox furnaces, air handlers, and zoning systems
• Genuine OEM Lennox replacement part
• Lightweight design at 0.25 lbs for easy installation

This thermostat coil is commonly used in residential and light commercial HVAC applications to prevent equipment damage from excessive discharge air temperatures. The automatic reset feature ensures the system can resume normal operation once safe temperatures are restored, eliminating the need for manual intervention.