Utica-Dunkirk 14655007 Pressure Switch

The Utica-Dunkirk 14655007 Pressure Switch is an essential air-proving safety component engineered for modern hydronic systems, primarily used in Dunkirk Boilers and Utica heating configurations. This SPST (Single Pole Single Throw) pressure switch is designed to monitor differential pressure, ensuring that the induction fan is creating sufficient draft before allowing the ignition sequence to proceed. Featuring a standard 1/4 compression connection, it provides a leak-resistant interface for pneumatic sensing lines. For field technicians, this part is a critical replacement when troubleshooting "no ignition" codes or blocked vent conditions. Its robust construction handles the rapid cycling of high-efficiency boilers, maintaining precise setpoint calibration to prevent nuisance lockouts. When performing a boiler pressure switch replacement, ensure the sensing tubing is clear of debris or moisture, as the Utica 14655007 relies on accurate vacuum or positive pressure signals to close the safety circuit and energize the gas valve.

• System Reliability: Provides consistent air-flow verification to prevent dangerous combustion scenarios.
• Direct OEM Integration: Designed specifically for Utica-Dunkirk boiler parts catalogs, ensuring proper mounting and electrical alignment.
• Durable Construction: Built to withstand the thermal stress and vibrational demands of residential and commercial boiler rooms.
• Standardized Connection: The 1/4 inch compression fitting allows for straightforward installation with existing copper or plastic sensing lines.
• Safety Compliance: Acts as a primary safety limit switch to disable the burner if flue gas venting is compromised.

How do I troubleshoot a Utica 14655007 that won't close?
First, verify that the inducer motor is reaching full RPM and that the venting is not obstructed. Use a manometer to check if the system is reaching the required pressure switch setpoint. If the pressure is adequate but the electrical contacts remain open, the switch is likely defective and requires replacement.

Can I use this switch for both vacuum and positive pressure applications?
Yes, depending on the boiler's design, this SPST pressure switch can be used to prove draft in either configuration. Always refer to your specific boiler's wiring diagram to ensure the 14655007 pressure switch is integrated into the safety string correctly.

What are the signs of a failing pressure switch?
The most common symptoms include the inducer motor running continuously without the burner lighting, or the boiler's control board displaying a "faulty air proving" error code. Ensure all HVAC pressure switch wiring is secure before condemning the part.

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.