Lochinvar & A.O. Smith 100166072 Pressure Switch

The Lochinvar & A.O. Smith 100166072 Pressure Switch is a critical safety component designed for precise vent pressure monitoring in high-efficiency commercial boilers and water heaters. This genuine OEM replacement part, which is 100% identical to the Lochinvar PRS1016, ensures that the inducer blower is moving sufficient air to maintain a safe combustion environment. As a veteran technician knows, a faulty exhaust pressure switch is a common culprit for ignition failure or system lockout codes. This switch is calibrated to exact manufacturer specifications to detect combustion air pressure drops, protecting the heat exchanger from improper venting conditions. Whether you are performing a water heater repair or a routine furnace pressure switch replacement, using the correct Lochinvar 100166072 ensures seamless HVAC part compatibility and prevents the "hunting" issues often seen with universal aftermarket alternatives. This SPST switch is engineered for high-cycle reliability in demanding mechanical rooms.

• Exact OEM Match: Fully replaces Lochinvar PRS1016 and A.O. Smith 100166072 without requiring bracket modifications.
• Critical Safety Integration: Prevents gas valve engagement unless proper negative pressure or airflow is established.
• Durable Construction: Built to withstand the high temperatures and moisture levels typical of condensing boiler exhaust streams.
• System Protection: Rapidly detects blocked flues or failing inducer motors to avoid hazardous carbon monoxide buildup.

• How do I know if the 100166072 switch has failed? Typically, the control board will throw a "Pressure Switch Open" or "Closed" fault code. Use a manometer to verify the actual inches of water column (WC) against the factory set point.
• Is this compatible with both Lochinvar and A.O. Smith units? Yes, since both brands utilize the same engineering platforms for many high-efficiency boilers and commercial water heaters.
• Can I use this if my old part says PRS1016? Absolutely. The 100166072 is the current production number for the PRS1016, maintaining the same electrical and pneumatic specs.

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.