Description
Lochinvar & A.O. Smith 100166229 SPDT Pressure Switch Overview
The Lochinvar & A.O. Smith 100166229 is an OEM replacement SPDT (Single Pole Double Throw) pressure switch calibrated to a 1.25″ water column (w.c.) set point. Designed for use in Lochinvar and A.O. Smith water heater and boiler applications, this pressure switch plays a critical role in monitoring combustion air pressure and ensuring safe system operation. When the required pressure threshold is not met — indicating a potential issue with the inducer or venting — the switch interrupts the control circuit, preventing unsafe ignition.
Key Features
- OEM replacement part for Lochinvar and A.O. Smith equipment
- SPDT (Single Pole Double Throw) switching action for versatile circuit control
- 1.25″ w.c. (inches water column) calibrated set point
- Monitors combustion air/inducer pressure for safe burner operation
- Interrupts control circuit if proper pressure is not established
- Direct drop-in replacement for simplified installation
Application
This pressure switch is engineered specifically for Lochinvar and A.O. Smith residential and commercial water heaters and boilers. It works in conjunction with the draft inducer assembly to confirm adequate venting pressure before allowing ignition, protecting equipment and occupants from hazardous operating conditions.
Why Choose OEM Parts?
Using genuine Lochinvar & A.O. Smith replacement components ensures compatibility, maintains warranty compliance, and delivers the performance reliability your equipment was designed to achieve. The 100166229 pressure switch is the manufacturer-specified solution for restoring proper pressure-sensing function.
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