Lochinvar & A.O. Smith 100208407 Switch Freon ensure the sensing bulb is

ensure the sensing bulb is fully seated within the immersion well and use thermal conductive paste if required by the specific application to eliminate air gaps

Key Benefits for the Technician Dual SPDT Switching: Two separate switches allow for simultaneous control and alarm functions

this 3/4" FNPT x 3/4" FNPT valve is factory-set at 30 PSI to prevent over-pressurization in demanding residential and commercial applications

dust-tight switch housing protects internal contacts from oil

known for its open-enclosure design that facilitates efficient heat dissipation and clear visual inspection of the double-break contacts

Lochinvar & A.O. Smith 100208407 Switch Freon ensure the sensing bulb isThe Lochinvar & A. O. Smith 100208407 Blocked Flue Switch is a critical safety component designed for high efficiency condensing boilers and water heaters. As a factory authorized replacement for PRS2708 and PRS2708K, this blocked flue pressure switch is calibrated to a specific 55" WC set point to detect dangerous venting restrictions. When flue gases cannot exit the heat exchanger due to obstructions like bird nests, ice, or excessive condensate