When performing a HVAC pressure switch replacement

this heavy-duty hinge kit ensures that cabinet doors on unit heaters and air handlers maintain a precise seal and smooth articulation

the 100346615 is the official direct replacement for the discontinued 100093971 gas valve

this harness utilizes mission-critical color-coded wiring and standardized terminal connectors to streamline the integration between the ignition control board

Always verify static pressure and temperature rise across the heat exchanger when replacing this component

Lochinvar & A.O. Smith 100113143 Switch 340793-762 When performing a HVAC pressureThe 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