Lennox 10J33 (LB-83856A) WELL-THERM is an OEM temperature sensing component designed for precise thermal monitoring in Lennox hydronic and boiler-based heating systems. This WELL-THERM sensor helps the control system accurately read water temperature, allowing the unit to maintain stable operation, proper heat output, and safe performance.Manufactured to Lennox OEM specifications, the 10J33 WELL-THERM ensures reliable communication between the system’s heat source and its control logic. It is commonly used in Lennox boiler and hydronic applications where accurate temperature feedback is critical for efficiency and equipment protection.

 

Key features:

• Genuine Lennox OEM WELL-THERM temperature sensor
• Designed for accurate water temperature measurement
• Supports stable system control and efficient heating operation
• Direct replacement for part number LB-83856A
• Built for long-term reliability in hydronic heating environmentsCommon applications:
• Lennox boiler systems
• Hydronic heating equipment
• OEM replacement during service or preventive maintenanceUsing a genuine Lennox WELL-THERM sensor helps ensure proper system calibration, reduces the risk of temperature-related faults, and maintains manufacturer-intended performance standards. This part is recommended for technicians and contractors servicing Lennox boiler and hydronic heating systems where accuracy and reliability are essential.