Lochinvar & A.O. Smith 100308917 Air Pressure Switch
The Lochinvar & A.O. Smith 100308917 is an OEM replacement air pressure switch rated at -0.75″ water column (WC). Designed to monitor and verify proper combustion air pressure and venting conditions in compatible Lochinvar and A.O. Smith boilers and water heaters, this switch plays a critical safety role in system operation. When the required negative pressure is not achieved — indicating a potential venting or inducer issue — the switch prevents the unit from firing, protecting both the appliance and building occupants.
Key Features
- OEM replacement part for Lochinvar and A.O. Smith appliances
- Rated setpoint: -0.75″ WC (water column)
- Monitors combustion air and venting pressure for safe operation
- Prevents ignition when proper draft or inducer pressure is not established
- Direct drop-in replacement for fast, reliable serviceability
- Engineered to OEM specifications for fit, form, and function
Application
- Compatible with select Lochinvar and A.O. Smith boilers and water heaters
- Designed for use in residential and light commercial heating applications
- Verify compatibility with your specific model before installation
Why Choose OEM Replacement Parts?
Using genuine OEM-specified components like the 100308917 ensures your equipment operates within its designed safety parameters. Aftermarket substitutes may not meet the precise pressure setpoint required, potentially leading to nuisance lockouts or unsafe operation. Trust the part engineered for your system.
