Utica-Dunkirk SS00801 Pressure Switch

The Utica-Dunkirk SS00801 Pressure Switch is a high-precision sensing component engineered for critical draft proving in condensing boilers and furnace inducer assemblies. Designed with a factory-set 0.55" WC trip point, this SPST (Single Pole Single Throw) switch ensures the combustion blower is pulling sufficient static pressure before allowing the ignition sequence to proceed. Its normally open (NO) configuration provides essential safety logic, closing the circuit only when the diaphragm detects the required vacuum or pressure threshold.

This OEM replacement features a 1/4" barbed connection for secure pneumatic tubing attachment and is rated for 120 VAC signal circuits. Constructed with industrial-grade materials to withstand the high-cycle demands of residential and commercial HVAC ventilation systems, the SS00801 is a direct match for many Utica Pennco and Dunkirk heating units. When diagnosing "no heat" calls, this 0.55 inches water column switch is a primary check point to verify inducer motor efficacy and flue integrity.

• Precise Draft Detection: Calibrated at 0.55" WC to ensure exact safety limit compliance during the startup sequence.
• Robust Connectivity: The 1/4" barbed connection prevents vacuum leaks and ensures a stable signal to the integrated diaphragm.
• OEM Compatibility: Specifically designed for Utica-Dunkirk boilers, maintaining the original engineering specifications for safety and air-flow monitoring.
• Standardized Electrical Interface: Features SPST switching logic compatible with standard 24V or 120V control boards.

How do I test the SS00801 for failure?
Using a manometer and a multimeter, verify that the switch closes continuity exactly when the system pressure reaches 0.55" WC. If the inducer provides greater than 0.55" but the SPST pressure switch remains open, the diaphragm is likely fatigued.

Can this replace a higher-rated pressure switch?
No. Pressure switches must match the manufacturer's exact "WC rating. Installing a 0.55" WC switch where a higher rating is required can lead to dangerous operation by allowing ignition without proper venting.

What causes this switch to cycle or trip frequently?
Frequent tripping is often caused by blocked flue vents, a failing inducer motor, or moisture buildup in the barbed connection tubing. Always inspect the pneumatic lines for cracks or condensation before replacing the component.

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.