It is critical to match the 1/8 HP and 810 RPM specifications exactly

22 standards for 2 PSI line pressure regulation

As the direct updated replacement for the 033199-0539

maintaining compressor longevity and system COP

Maximum Compatibility: Purpose-built for the 20F24C2172AAF 1-1/4" NPT brass valve body

Trane CNT3666 Pressure Switch 326058-756 It is critical to matchThe 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