Trane CNT3666 Pressure Switch 321894-709 ensuring the contact bridge handles

ensuring the contact bridge handles the startup inrush current of HVAC compressors without sticking

Internal Performance: Features heavy-duty internal components designed to resist scale buildup and maintain buoyancy in turbulent water conditions

Direct-Fit Installation: The included burner support (48TM505275) and burner manifold (48TM405272) simplify assembly in the field

Does this motor include a replacement gasket

using a genuine OEM blower motor like the S1-024-35705-008 ensures the specific torque-to-speed ratios required for York unit airflow data are maintained

Trane CNT3666 Pressure Switch 321894-709 ensuring the contact bridge handlesThe 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