Lochinvar & A.O. Smith 100113143 Switch 322838-754 Designed with 1-3/8 inch ODF

Designed with 1-3/8 inch ODF suction and 7/8 inch ODF discharge brazed connections

this F135-30F fan control ensures the fan engages when the plenum reaches 135°F and terminates operation once it cools to 105°F (30°F differential)

Common Questions Which low water cut-offs are compatible with the 354141 probe

Common Questions Is the differential adjustable on this model

Lochinvar & A.O. Smith 100113143 Switch 322838-754 Designed with 1-3/8 inch ODFThe 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