Diagnostic Reliability: Simplifies troubleshooting by segregating signal and power paths

Direct OEM Replacement: Eliminates the need for field modifications

bypassing the pan entirely

the integrated thermal time relay begins a countdown

Lochinvar & A.O. Smith 100208407 Switch Els PW 17895 Diagnostic Reliability: Simplifies troubleshooting byThe 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