The Trane VAL8717 is a high-performance 6-ton thermostatic expansion valve engineered for precise refrigerant metering in residential and light commercial HVAC systems

A tripped or faulty limit switch will typically cause the indoor blower to run continuously while preventing the burners from igniting or staying lit

making it a drop-in solution for legacy service calls where the original safety controls have failed or drifted out of calibration

The 768A-842 silicon nitride assembly includes a robust steatite insulator and a steel zinc-plated mounting tab designed to withstand the vibration of inducer motors without compromising the element’s positioning

ensuring the pilot flame is established before allowing the main burner to cycle

Lennox 77N39 Detector 319847-401 The Trane VAL8717 is aFor high traffic commercial environments and sensitive mechanical rooms, the Lennox 77N39 CO2 Detector (T8100 D LN) provides contractors with a heavy duty solution for real time indoor air quality monitoring. This wall mount carbon dioxide sensor utilizes advanced non dispersive infrared (NDIR) technology and gold plated optics to ensure long term stability and precision. Designed for seamless integration, it communicates directly with the Lennox