Williams P500118 Limit Switch 319825-402 If your system requires dry

If your system requires dry contacts to prove valve opening

Precise Ignition Control: Automates the sequence of operations for the inducer motor and hot surface igniter

while the L-M1 contacts close on high pressure to trigger notification systems

Rugged Installation: Includes an integrated mounting bracket for secure positioning within the heater cabinet

15 microampere threshold

Williams P500118 Limit Switch 319825-402 If your system requires dryThe Williams P500118 Limit Switch is a critical OEM high limit safety control engineered for precision temperature regulation in Williams Comfort Products heating systems. Rated at 300F, this auto reset limit switch acts as a primary fail safe, monitoring heat exchanger temperatures to prevent thermal overage and potential component failure. In a professional HVAC furnace repair context, utilizing an authentic Williams furnace part ensures the system