System Compatibility: Explicitly designed for McDonnell & Miller RS sensors used in remote level sensing configurations

featuring a strictly calibrated

Standardized Dimensions: Precise fit at 20x13x3/8 ensures no air bypass

the internal bimetal disc in the switch may have fatigued

It features two setpoint windows

Williams P500406 Limit Switch System Compatibility: Explicitly designed forThe Williams P500406 Limit Switch is a critical safety component designed for precise thermal regulation in Williams Monterey top vent heaters and furnace gas valves. Engineered with a 270 degree Fahrenheit Cut Out, this Manual Reset (M R) limit switch serves as a reliable failsafe, interrupting the electrical circuit to the gas valve if internal temperatures exceed safe operating parameters. This specific HVAC high limit control is essential for