Lochinvar & A.O. Smith 100111032 Pressure Switch

The Lochinvar & A.O. Smith 100111032 Pressure Switch is a critical safety component designed for LP Liquid Propane applications in high-efficiency commercial water heaters and boilers. As a Low Gas Pressure Switch, its primary function is to monitor the incoming fuel supply and interrupt the burner circuit if the pressure drops below the calibrated set point. This proactive safety measure prevents incomplete combustion, carbon monoxide buildup, and potential equipment damage, making it an essential OEM replacement part for maintaining system integrity and ASHRAE compliance.

This genuine Lochinvar part is engineered for precision and durability in demanding industrial environments. It is a direct fit for A.O. Smith BTH, SUF, and HCG series commercial units (specifically 60-120 and 100-150 models) and serves as a replacement for the now-obsolete part number 9006255015. For technicians performing HVAC pressure switch troubleshooting, this 100111032 switch ensures consistent electrical contact activation and seamless integration with the factory control module, providing reliable flame supervision and burner protection throughout the equipment duty cycle.

Key Benefits for Technicians:

• Direct OEM Compatibility: Verified fit for A.O. Smith and Lochinvar commercial gas water heaters and high-efficiency boilers.
• Propane Optimized: Specific internal calibration for LP gas systems to ensure accurate low-pressure detection.
• System Safety: Protects the heat exchanger and burner assembly by preventing operation under low-fuel conditions that lead to soot and flame instability.
• Robust Electrical Contacts: Designed for high-cycle reliability within the safety string of commercial heating control circuits.

Common Questions:

• Can this switch be used for natural gas applications? No, this specific model is calibrated for LP (Propane) gas pressure. Using it with natural gas may lead to improper trip points and safety hazards.
• Is this a universal pressure switch? No, the 100111032 is a brand-specific repair part. Always verify the model and serial number of your Lochinvar or A.O. Smith unit before installation.
• What are the symptoms of a failing low gas pressure switch? Common indicators include intermittent ignition failure, error codes on the control board related to gas supply, or the burner cutting out prematurely during high-demand cycles.

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.