Trane CNT3666 Pressure Switch 323080-701 Veteran technicians know that a

Veteran technicians know that a warped or corroded furnace back plate can lead to vacuum leaks

Watch for short cycling

Utilizing genuine HVAC replacement parts like the Reznor 123976 ensures your equipment maintains factory-spec efficiency and reliability

the 333981-401 top cover is designed to withstand harsh outdoor conditions without compromising system airflow

External components like the flame sensor or 11072202 orifice shield may need to be sourced separately if needed

Trane CNT3666 Pressure Switch 323080-701 Veteran technicians know that aThe Trane CNT3666 Pressure Switch is a critical safety component engineered for precise draft monitoring in high efficiency HVAC systems. This single pole single throw (SPST) switch is factory calibrated to a 0. 15" WC set point, ensuring the inducer motor establishes a proper vacuum before allowing the ignition sequence to proceed. Designed as a direct OEM replacement pressure switch, it features a 1 4" barbed connection for secure pneumatic tubing