Lochinvar & A.O. Smith 100208407 Switch Freon Precision Calibration: Factory-set trip points

Precision Calibration: Factory-set trip points specific to Copeland motor characteristics for accurate overload protection

This servo-operated regulator is compatible with a wide range of refrigerants

While cleaning with a light abrasive can temporarily restore signal

This unit features a standard 1/4" barb connection for easy vacuum hose integration and a robust zinc-plated steel or high-temperature plastic housing

Lochinvar & A.O. Smith 100208407 Switch Freon Precision Calibration: Factory-set trip pointsThe 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