Lochinvar & A.O. Smith 100166234 Pressure Switch

The Lochinvar & A.O. Smith 100166234 is a robust 1.15" WC SPDT pressure switch designed for critical monitoring in high-efficiency heating systems. As a direct OEM replacement part, it is identical to PRS30014 and PRS2424, ensuring seamless integration without field modifications. This diaphragm-actuated switch utilizes a Single-Pole Double-Throw (SPDT) contact configuration, allowing it to function as a safety interlock by verifying proper venting and combustion air pressure. It is compatible with a wide range of Lochinvar Copper-Fin II models, including 501, 651, and 751, as well as various A.O. Smith water heaters.

For technicians in the field, this low air pressure switch is the standard for maintaining HVAC system safety and operational uptime. It is rated for 1.15 inches of water column and serves as a critical boiler pressure switch to prevent ignition under unsafe draft conditions. The kit comes with the necessary hardware for a secure HVAC part installation, providing the reliability required in commercial and residential gas valve assemblies. When troubleshooting codes related to pressure differentials, utilizing a genuine 100166234 pressure switch ensures the system operates within manufacturer specifications.

• Universal Compatibility: Serves as a primary OEM replacement for part numbers 100166234, PRS30014, and PRS2424 across multiple boiler families.
• Precision Calibration: Factory-set at 1.15" WC to ensure accurate sensing of air pressure or flue exhaust within strict tolerances.
• Versatile Electrical Logic: The SPDT contact configuration allows for flexible wiring to meet both "normally open" and "normally closed" circuit requirements.
• Durable Construction: Engineered to withstand the heat and cycling of commercial HVAC applications and gas valve assemblies.

• What units are compatible with the 100166234 switch? It is widely used in Lochinvar Copper-Fin II models (401-751) and A.O. Smith commercial water heaters requiring a 1.15" WC set point.
• Can I use this to replace a PRS30014? Yes, the 100166234 is the current manufacturer-designated replacement for the PRS30014.
• What does SPDT mean for this installation? It provides three terminals (Common, NO, NC), allowing the technician to match the specific pressure switch wiring diagram of the 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.