Armstrong Furnace R101432-13 Pressure Switch

The Armstrong Furnace R101432-13 Pressure Switch is a critical safety component designed for high-efficiency gas furnaces. Engineered with a -.60"WC set point, this SPST (Single Pole Single Throw) switch monitors the pressure differential within the inducer housing to ensure the combustion blower is extracting flue gases correctly. This specific model features a dual 1/4" barb connection, providing a secure interface for vacuum tubing. As a direct OEM replacement pressure switch, it is functionally identical to part numbers 57W78 and 57W7801. Technicians should verify the WC rating and normally open contacts during diagnostic cycles to prevent inducer motor pressure switch lockout. This switch is calibrated for precision sensing, protecting the heat exchanger from improper venting conditions. Integrating this HVAC replacement part ensures the system meets exact manufacturer specifications for airflow verification and ignition sequences.

• OEM Compatibility: Precision-calibrated for Armstrong, Lennox, and AirEase systems, replacing 57W78 and 57W7801.
• Accurate Set Point: Calibrated to -.60"WC to prevent nuisance tripping and ensure reliable combustion cycles.
• Durable Construction: Built with high-grade diaphragms to withstand heat cycles and constant pressure fluctuations.
• Standardized Connections: Dual 1/4" barb fittings allow for quick integration with existing pneumatic tubing.

What causes a pressure switch to fail in high-efficiency furnaces?
Failure is often caused by a ruptured internal diaphragm, moisture buildup in the vacuum lines, or a failing inducer motor that cannot produce the required -.60"WC pressure.

Can I use an adjustable switch to replace the R101432-13?
It is not recommended. This switch is factory-set to -.60"WC for specific safety parameters; using an incorrect rating can lead to incomplete combustion or safety hazards.

Is the R101432-13 compatible with Lennox systems?
Yes, this part is the direct cross-reference for Lennox 57W78, making it a standard stock item for servicing those units.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.