Lochinvar & A.O. Smith 100113143 Switch 322838-752 For a reliable furnace rollout

For a reliable furnace rollout switch replacement

or maintaining flow during a power outage

It will not open if the inlet and outlet pressures are equalized or if the system pressure is below this threshold

This 185-215F Auto Limit Switch functions as a fail-safe by monitoring internal plenum temperatures

Plug-and-Play Compatibility: Includes the correct terminal connector

Lochinvar & A.O. Smith 100113143 Switch 322838-752 For a reliable furnace rolloutThe Lochinvar & A. O. Smith 100113143 Blocked Inlet Switch is a critical safety component designed for high efficiency commercial water heaters and boilers, including the Cyclone BTH and State SUF series. This genuine OEM replacement part acts as a normally closed (NC) pressure sensor calibrated to 2. 5" WC. Its primary function is to monitor the integrity of the air intake system, ensuring the combustion blower receives adequate airflow for safe