Armstrong Furnace R45694-007 Pressure Switch

The Armstrong Furnace R45694-007 Pressure Switch is a critical safety component engineered specifically for Armstrong Air HVAC equipment. This OEM replacement pressure switch features a .35" WC set point, ensuring precise monitoring of the inducer fan airflow and venting conditions before allowing ignition. Designed with a Single Pole Single Throw (SPST) configuration, it provides a reliable normally-open circuit that closes when the proper negative pressure is achieved. The 1/4" barb connection allows for a secure fit with standard vacuum tubing, preventing pressure drops that cause furnace pressure switch lockout codes. As a high-performance HVAC draft inducer switch, it is built to withstand the thermal cycling typical in residential furnace diagnostic and repair scenarios. Utilizing genuine Armstrong Air parts ensures the internal diaphragm and contact points meet exact manufacturer specifications for long-term reliability in the field.

Key Benefits for Contractors:

• Exact OEM Specifications: Eliminates the guesswork associated with universal switches by providing an exact .35" water column trip point.
• Direct Compatibility: Designed for seamless integration into Armstrong Air and Concord furnace control circuits.
• Durable Construction: High-grade housing and 1/4" barb fittings resist cracking and vibration-induced failure.
• Safety Compliance: Ensures the combustion process only occurs when the flue is properly vented.

Common Questions:

Why is my Armstrong furnace displaying a pressure switch error?
A furnace pressure switch typically trips due to an inducer motor failure, a blocked flue, or a ruptured diaphragm within the switch itself. If the motor is running and the vent is clear, the R45694-007 may need replacement.

Can I use a universal switch instead of the R45694-007?
While universal switches exist, they often require calibration. Using this OEM Armstrong pressure switch ensures the .35" WC setting matches the original furnace design for safe operation.

What is the purpose of the 1/4" barb connection?
The 1/4" barb is the standard interface for the pressure tubing that connects the switch to the inducer housing or collector box, ensuring a leak-proof seal for accurate pressure sensing.

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.