Williams P200200 Fan Switch it features an integrated Fahrenheit

it features an integrated Fahrenheit and Celsius thermometer and a single setpoint window to ensure clear visibility of system parameters

While specifically engineered for Honeywell damper actuators and Q605 series kits

The robust build prevents bending under high-flow turbulence

WeatherKing

Using a higher limit can lead to unsafe cabinet temperatures

Williams P200200 Fan Switch it features an integrated FahrenheitThis Williams P200200 Fan Switch is a critical OEM replacement fan control designed for precise thermal management in Williams Forsaire and Magnum series furnaces. Engineered with a setpoint of 120F ON and a 15F differential, this SPST (Single Pole Single Throw) switch operates on a normally open circuit. It triggers fan activation once the plenum reaches the 120F threshold to ensure efficient heat exchange and prevent short cycling. As temperatures