Utica-Dunkirk 14660001 Spill Switch

The Utica-Dunkirk 14660001 Spill Switch is a critical vent safety switch engineered specifically for Dunkirk PWXL boilers and compatible Utica gas-fired steam boilers. As a primary safety control, this thermal sensing component monitors the draft hood for abnormal flue gas spillage resulting from chimney obstructions or downdrafts. Calibrated to a 340°F activation temperature, the switch breaks the electrical circuit to the gas valve when excessive heat is detected at the relief opening, preventing hazardous carbon monoxide from entering the building. This model features a manual reset button, requiring a technician to inspect the venting system to clear blockages or address draft issues before resuming operation.

Constructed with high-heat resistant materials and a disc-type thermostat housing, the 14660001 spill switch ensures reliable continuity in the safety loop under standard operating conditions. Its compact footprint allows for direct mounting on the draft diverter or flue collector using standard hardware. For service professionals, this OEM replacement part is essential for maintaining the integrity of the blocked vent safety system. Whether troubleshooting a boiler that won't fire due to an open safety circuit or performing a scheduled draft test, utilizing a genuine Utica-Dunkirk 14660001 ensures the system remains within the original manufacturer's safety specifications.

• Precise Thermal Calibration: Engineered with a fixed 340°F trip point to accurately detect flue gas backup without nuisance tripping during normal startups.
• Durable Manual Reset: Provides a rigid safety protocol that forces an inspection of the chimney and venting path following a high-limit event.
• OEM Compatibility: Specifically designed for the Dunkirk PWXL series and Utica hydronic boilers, ensuring it fits existing mounting brackets and terminal leads perfectly.
• Rugged Construction: Built to withstand the high-temperature environment of a gas boiler draft hood without premature failure or drift in sensing accuracy.

What causes a 340F spill switch to trip?
Tripping is typically caused by a blocked chimney, a collapsed flue liner, or severe downdrafts. In modern tight homes, large exhaust fans can also create negative pressure that pulls flue gases out of the draft hood and onto the vent safety switch.

Can I bypass the spill switch for testing?
Bypassing a safety control is not recommended for operational use. A HVAC technician may utilize a multimeter to check for continuity across the terminals; if the switch is open and the reset button is engaged, the internal disc has likely failed and requires replacement.

Does this switch work on oil-fired equipment?
The 14660001 is specifically rated for gas-fired residential atmospheric boilers. Check your specific wiring diagram and model data plate to ensure the temperature rating (340F) matches the requirement for your appliance.

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.