You must always match the temperature ratings (L120-20) of the existing bimetal limit switch to ensure the furnace operates within its designed safety parameters

the thermocouple is likely no longer producing the necessary millivoltage to hold the gas valve open

The Functional Devices TR40VA004 is a versatile 40VA multi-tap power transformer engineered for reliable 24Vac secondary output in demanding HVACR and building automation environments

providing exceptional stability and resistance to contaminants

Electrical Efficiency: Optimized for 230V systems with a 1/25 HP rating for consistent induced draft performance

Trane SEN1816 Sensor 30067439-890 You must always match theThe Trane SEN1816 Sensor is a genuine OEM replacement component designed for use in compatible Trane commercial and residential HVAC systems. This Trane SEN1816 sensor monitors critical operating conditions and provides accurate feedback to the system control board, helping maintain proper equipment performance, system efficiency, and reliable operation. When servicing Trane equipment, using a genuine OEM Trane sensor helps ensure proper communication