Lochinvar & A.O. Smith 100166146 Pressure Switch

The Lochinvar 100166146 Pressure Switch is a critical safety component designed for precise pressure monitoring within high-efficiency commercial boilers and water heaters. Engineered as a direct replacement for the PRS2045, this manual reset pressure switch ensures the burners only fire when the venting system maintains safe atmospheric conditions. This OEM Lochinvar part is built to handle the rigorous duty cycles of A.O. Smith and Lochinvar Knight models, providing reliable differential pressure sensing to prevent hazardous exhaust accumulation. For contractors performing diagnostic services, replacing a fouled or sticking 100166146 switch is essential for restoring system sequencing and preventing repetitive lockout codes. By utilizing high-grade internal diaphragms and robust electrical contacts, this replacement pressure switch offers the durability needed for demanding mechanical rooms. Ensure your HVAC ventilation safety protocols are met by installing this factory-specified component to maintain precise boiler pressure regulation performance.

Key Benefits

• Direct OEM Compatibility: Verified replacement for PRS2045 and 100166146 across multiple A.O. Smith and Lochinvar product lines.
• Manual Reset Safety: Integrated manual reset function ensures a technician inspects the venting system before the unit resumes operation after a trip.
• Precise Set-Point Tolerance: Calibrated to exact factory specifications to ensure safe boiler firing and proper flue gas discharge.
• Durable Construction: Built to withstand high heat and humidity levels typical of modern condensing boiler cabinets.

Common Questions

What causes a pressure switch lockout on Lochinvar boilers?
Blockages in the intake or exhaust venting, condensate drainage issues, or a ruptured internal diaphragm in the Lochinvar 100166146 can cause persistent lockout codes.

Can I substitute an auto-reset switch for this manual reset model?
No. In commercial heating applications, the manual reset pressure switch is a specific safety requirement to ensure system faults are addressed by a professional before restart.

Is the 100166146 identical to the PRS2045?
Yes, the 100166146 is the updated part number and is functionally and physically identical to the PRS2045.

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.