Lennox 97M60 Defrost Sensor

The Lennox 97M60 Defrost Sensor is a critical OEM replacement part designed for high-performance heat pump defrost control. Also identified by part number 97M6001 or Lennox 100503-03, this SPST defrost thermostat sensor is engineered to monitor coil temperatures with precision. It features a specific thermal profile, typically opening at 70 degrees F and closing at 42 degrees F, to initiate the defrost cycle only when necessary. This prevents ice buildup on outdoor coils, ensuring the system maintains optimal airflow and heat transfer efficiency during low-ambient operation. Built with 35-inch leads for flexible routing, this coil temperature sensor is compatible with a wide range of Lennox, Armstrong, and Ducane units. By accurately signaling the defrost control board, it protects the compressor from strain and prevents the unit from becoming a solid block of ice, maintaining the integrity of the reversing valve and auxiliary heat sequence.

• Direct OEM Compatibility: Replaces Lennox 97M6001 and 100503-03, ensuring a perfect fit and factory-spec performance.
• Precision Defrost Timing: Accurately detects frost on the evaporator coil to prevent unnecessary cycles and minimize energy waste.
• Heavy-Duty Construction: Features 35" leads and rugged sensor housing built to withstand harsh outdoor environments and vibration.
• System Protection: Prevents condenser fan motor failure and compressor slugging by managing ice accumulation during heating mode.

• Is the Lennox 97M60 the same as the 97M6001? Yes, the 97M60 is identical to the 97M6001; they are interchangeable part numbers for the same Genuine Lennox sensor.
• What are the temperature ratings for this sensor? This SPST sensor is rated to close at 42°F to allow defrosting and open at 70°F to terminate the cycle.
• Will this fix a frozen heat pump? If your system is experiencing excessive ice buildup due to a faulty signal to the defrost board, replacing a failed coil sensor is the standard solution.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.