leading to improved furnace energy efficiency and reduced emissions

it is designed strictly for refrigerant pressure monitoring

Robust SPNO contact configuration (Normally Open) ensures a reliable circuit path for secondary fan motors or humidifiers

Professional-Grade Wiring: Pre-stripped 8-inch color-coded leads simplify field connections for faster installs

Williams P296201 Switch leading to improved furnace energyThe Williams P296201 Switch is a mission critical differential temperature switch designed specifically for Williams Forsaire Counterflow top vent and Magnum High Efficiency furnace models. This genuine OEM replacement part functions as a high limit safety and blower control, featuring a fixed 165F setpoint for circuit interruption or activation, with a precise 35F differential. When the heat exchanger reaches the 165F threshold, the switch engages or