Lennox 14A49 – 104549-07 2-Stage Pressure Switch provides reliable airflow safety control for modern high-efficiency gas furnaces. Designed for dual-stage operation, it monitors draft and combustion pressure during both low and high fire cycles, helping prevent furnace lockouts and supporting consistent performance throughout the heating season. Precision-calibrated set points maintain proper system sequencing and protect heat exchangers from unsafe operating conditions.

Compatible with select Lennox two-stage units, this OEM replacement switch restores factory performance without field adjustment. The sealed housing reduces moisture intrusion and vibration impact for long-term stability in residential and light commercial applications.

Key features:
• Factory-rated high set point of 0.85 inch W.C. and low set point of 0.45 inch W.C.
• Supports staged heating for smoother temperature control and reduced cycling
• OEM Lennox component for accurate fit and dependable system protection
• Helps prevent ignition failure and pressure-related shutdowns
• Durable construction for reliable performance across heating seasons
• Ideal for maintenance, diagnostics, and preventative replacement

Spesigications:

BrandLennoxCatalog Number14A49Model/Part Number104549-07Base Unit of MeasureEACHEAN / UPC66255148814Type2-Stage Pressure SwitchGross Weight1 LBType2-Stage Pressure SwitchPressure SettingsSet Point High 0.85" W.C.; Set Point Low 0.45" W.C.Additional InformationContact Rating: 5 Amp Resistive at 24 VACConfigurationSPST-N.O. Contact