The Utica-Dunkirk 1401004 Pressure Switch is a mission-critical safety component engineered for high-efficiency condensing boilers, specifically optimized for the Q90 series. This OEM replacement pressure switch features a precise 0.4" WC (Water Column) set point and a factory-calibrated SPDT (Single Pole Double Throw) configuration, ensuring reliable draft verification before the ignition sequence initiates. Designed with a 1/4" barbed connection for a secure, leak-proof interface with the inducer housing or collector box, this switch protects the heat exchanger by monitoring for venting obstructions or combustion blower failure. For service technicians, the Utica 1401004 provides a direct-fit solution that eliminates field calibration guesswork. Its high-sensitivity diaphragm is built to withstand domestic heating demands while maintaining consistent response times during cold starts. When troubleshooting condensing boiler error codes related to airflow, this 0.4" WC pressure switch serves as the definitive replacement to restore system safety and operational continuity in residential and light commercial HVAC applications. Key Benefits OEM Compatibility: Exact replacement for Q90-125, Q90-150, Q90-175, and Q90-200 Series 2 boilers. Precision Switching: Calibrated to 0.4" WC to ensure tight tolerance for draft monitoring. Durable SPDT Circuitry: Provides versatile wiring options for standard safety loops. Simplified Installation: Standard 1/4" barbed port integrates seamlessly with existing pressure tubing. System Protection: Prevents gas valve activation under restricted flue or intake conditions. Common Questions What are the symptoms of a failing Utica 1401004 pressure switch? Common signs include the inducer motor running continuously without ignition, "pressure switch stuck open" error codes on the control board, or the system locking out shortly after the start-up sequence begins. Can I use this switch for different set points? No. This 1401004 model is factory-set to 0.4" WC. Using a switch with an incorrect set point can lead to hazardous combustion conditions or frequent nuisance trips. Always match the "WC rating exactly to the manufacturer's specifications. How do I test the 1/4" barbed connection for leaks? Inspect the tubing for cracks or moisture. Use a manometer to verify the inducer is pulling at least 0.4" WC of vacuum at the port. If proper vacuum is present but the SPDT switch does not close, the diaphragm may be ruptured. 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.
