Lochinvar & A.O. Smith 100187859 Switch 340155-7026 or failure to initiate the

or failure to initiate the cooling/heating sequence despite receiving a valid 24V signal

Precision Safety: Features automatic reseating and a non-mechanical alignment system to ensure the valve closes tight after a relief event

5" to 8" accommodates multiple duct dimensions

While the VG7241PT is optimized for water and glycol solutions

This service model is the industry standard for maintaining uptime in critical light commercial HVACR infrastructure

Lochinvar & A.O. Smith 100187859 Switch 340155-7026 or failure to initiate theThe Lochinvar & A. O. Smith 100187859 Switch is a critical 2. 0" blocked outlet switch designed for high efficiency gas fired commercial water heaters and boilers. As a genuine OEM replacement part, this pressure switch is calibrated to detect vent obstructions, ensuring the system shuts down safely if exhaust gases cannot be properly expelled. It is commonly utilized in A. O. Smith Cyclone BTH 300A series and comparable Lochinvar Power Fin models.