Lochinvar & A.O. Smith 100208405 Pressure Switch 328140-751 this temperature-sensitive control allows for

this temperature-sensitive control allows for remote bulb placement far from the electrical enclosure

this genuine Source1 part ensures the integrated control module communicates correctly with the system furnace board

which is designed for weather resistance against rain and snow

Replacing a cracked or leaking 311213-404 is essential for preventing water damage to the secondary heat exchanger and the furnace control board below

Check your regulator’s data plate

Lochinvar & A.O. Smith 100208405 Pressure Switch 328140-751 this temperature-sensitive control allows forThe Lochinvar & A. O. Smith 100208405 Pressure Switch is a critical safety component designed for high efficiency condensing boilers and commercial water heaters. This OEM replacement pressure switch monitors the pressure differential within the combustion chamber or venting system to ensure safe operation. When the blower motor proof is established, the switch closes its contacts to allow the ignition sequence to proceed. If a blocked flue or