the 661057R is specifically sized (#57) for Liquid Propane (LP) applications

non-corrosive plastic for long-term reliability in wet environments

The unit comes equipped with a single set screw and the necessary mounting hardware to ensure a positive lock on the shaft

Should I replace the gasket every time I inspect the float mechanism

Nordyne 626422R Limit Switch the 661057R is specifically sizedThe Nordyne 626422R Limit Switch is a critical safety component designed for furnace rollout protection in gas fired and oil fired HVAC systems. This thermal limit switch is engineered to open the circuit at a 155F cut out temperature, immediately interrupting the gas valve circuit if flame rollout or excessive heat is detected near the burner box. As a manual reset rollout switch, it requires a technician to physically inspect the heat exchanger and