Lochinvar & A.O. Smith 100166246 Pressure Switch Kit

The Lochinvar & A.O. Smith 100166246 Pressure Switch Kit is a critical safety component designed for precise combustion air monitoring in high-efficiency boilers and water heaters. As a veteran-grade OEM replacement part, this kit ensures the integrated VFD blower or inducer fan is generating the correct static pressure before allowing the ignition sequence to proceed. It acts as a blower prover switch, effectively preventing the gas valve from opening if venting obstructions or mechanical fan failures are detected. Utilizing a high-sensitivity internal diaphragm, the 100166246 monitors inches of water column (W.C.) to verify the exhaust and intake integrity during the entire heating cycle.

Engineered for compatibility with specific Lochinvar Power-Fin and A.O. Smith Cyclone models, this pressure switch kit provides a direct-fit solution for technicians troubleshooting "no-ignition" or "pressure switch stuck open" fault codes. The kit includes the necessary sensing tube connections and mounting hardware to restore Sequence of Operation reliability. When performing HVAC diagnostics, always use a digital manometer to verify the set point against the unit’s technical specifications to ensure the switch activates on the correct rise or fall of pressure, maintaining peak performance of the combustion control system.

Key Benefits:

• Direct OEM Compatibility: Ensures seamless integration with Lochinvar and A.O. Smith commercial water heaters and boilers.
• Enhanced Combustion Safety: Prevents hazardous operation by verifying proper venting airflow and blower performance.
• Sensitive Pressure Detection: Calibrated to detect minute changes in static pressure, reducing nuisance lockouts.
• Durable Construction: Built to withstand the high-cycle demands of industrial and residential hydronic heating environments.
• Simplified Installation: Standard terminal connections and sensing ports allow for rapid field replacement by contractors.

Common Questions:

• How do I know if the 100166246 pressure switch is failing? If your system displays a "Pressure Switch Open" error or fails to ignite despite the blower running, the switch may be failed or the sensing tube may be obstructed.
• Does this kit include the tubing? Yes, the kit typically includes the sensing tubes and necessary hardware to ensure a complete pneumatic seal at the sensing port.
• Can this be used as a universal pressure switch? No, pressure switches are calibrated to specific W.C. set points for specific appliance models; always verify the part number against your boiler's service manual.

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.