Utica-Dunkirk 14631312 Pressure Switch

The Utica-Dunkirk 14631312 Pressure Switch is a critical safety component engineered for precise airflow monitoring in high-efficiency boilers and furnaces, including the Dunkirk Q90-100 Series 2. Featuring a fixed setpoint of 1.00" WC, this SPST pressure switch operates on a single-pole, single-throw logic to ensure the inducer fan is generating sufficient negative pressure before allowing the ignition sequence to proceed. Designed for rugged field use, it utilizes a barbed connection for secure pneumatic tubing attachment, preventing vacuum leaks that lead to nuisance code trips. As an authentic OEM replacement part, it maintains the exact calibration required for combustion safety and venting integrity. This HVAC differential pressure switch is essential for technicians performing rapid diagnostics on Utica boilers or resolving "pressure switch stuck open" errors. Its snap-action contact design provides a reliable electrical interface with the integrated furnace control, ensuring long-term operational stability in demanding residential and commercial heating environments.

• Optimized Calibration: Pre-set at 1.00" WC to match original factory specifications for Dunkirk Q90-100 systems.
• Secure Interlocking: Integrating a barbed connection ensures a tight seal with standard sensing tubing to prevent airflow signal loss.
• Rugged Electrical Performance: The SPST switch logic provides clean make/break signals to the control board to prevent erratic ignition cycles.
• Direct Fit OEM Component: Eliminates the guesswork associated with universal parts, ensuring the Utica 14631312 fits existing mounting brackets perfectly.
• Safety Compliance: Corrects airflow pressure issues to prevent the accumulation of unburned fuel in the heat exchanger.

How do I troubleshoot a 1.00" WC setpoint error?
Verify the inducer motor is reaching full RPM and check the barbed connection and venting for obstructions. If the flue is clear and the fan is drawing adequate vacuum but the SPST pressure switch fails to close, the internal diaphragm may be fatigued.

Is this switch compatible with other Utica or Dunkirk series?
While primarily used for the Q90-100 Series 2, always cross-reference the 14631312 part number against your specific model's parts list to confirm the pressure rating matches the unit's venting requirements.

What causes these switches to fail prematurely?
Common causes include moisture buildup in the sensing lines, heat stress from improper venting, or debris entering the barbed connection, all of which can impede the movement of the internal diaphragm.

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.