Nordyne 904574 Limit Switch Does the 12A39 require a

Does the 12A39 require a multi-stage vent line

A standard 10mm wrench or socket is required to properly torque the clamp nuts to the OEM specification

Constructed with durable materials to withstand harsh environments

always verify the boiler parts list for the specific series you are servicing

whether installed inline or directly at the pneumatic controller or actuator to prevent hunting and stabilize system output

Nordyne 904574 Limit Switch Does the 12A39 require aThe Nordyne 904574 Limit Switch is a critical safety component designed for high limit temperature monitoring within gas fired furnaces. This 145F CO auto limit switch serves as a primary thermal watchdog, specifically engineered to open the electrical circuit at a fixed set point of 145 degrees Fahrenheit. By integrating a time delay relay, the 904574 ensures that the system responds accurately to abnormal heat rise and potential carbon monoxide