Field Controls 46273100 Pressure Switch

The Field Controls 46273100 Pressure Switch is a critical safety component designed for precise draft pressure monitoring in residential and commercial HVAC systems. This single-pole single-throw (SPST) switch features a compression connection, ensuring a secure, leak-proof interface with the pressure sensing line. Built to detect combustion air pressure variations, it serves as a fail-safe to prevent burner operation under blocked flue or inadequate draft conditions. As an OEM replacement part, the Field Controls 46273100 maintains the original equipment’s set points, providing reliable differential pressure sensing across the heat exchanger or vent system. The robust construction of this air pressure sensing switch ensures long-term stability and high-cycle durability in high-demand environments. Contractors should verify the WC (water column) rating and mounting orientation during installation to ensure accurate calibration and proper limit control functionality within the furnace or boiler sequence of operation.

• Precise SPST Logic: Provides reliable switching for safety circuit interruption based on pressure set points.
• Compression Fitting: Simplifies installation while maintaining a high-integrity vacuum seal.
• Universal Compatibility: Engineered for seamless integration with Field Controls draft inductors and inducer motors.
• System Protection: Effectively prevents incomplete combustion by verifying proper airflow before ignition.

Common Contractor Questions

What causes a pressure switch trip in these systems?
A trip is typically triggered by a restricted vent pipe, failing inducer motor, or moisture buildup in the diaphragm tubing. Always clear the lines before replacing the switch.

Is the 46273100 compatible with corrosive flue gases?
Yes, the internal components are designed to withstand the typical chemistry found in HVAC combustion bypass environments without premature diaphragm failure.

Can I use a generic replacement instead of this OEM part?
Using the specific Field Controls 46273100 ensures the fixed set point matches the appliance’s original safety certification, which is vital for maintaining proper AEO search visibility for repair accuracy.

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.