Marley Engineered Products 4520-2018-003 Limit Switch or soot/dust buildup on the

or soot/dust buildup on the heating elements

High-volume damper shaft sizes including 1/2"

this rugged 120V unit features a double-pole single-throw (DPST) switch configuration

including sizes 30 through 55

Marley Engineered Products 4520-2018-003 Limit Switch or soot/dust buildup on theThe Marley Engineered Products 4520 2018 003 Limit Switch is a critical safety component engineered for forced air heating applications where precise thermal protection is non negotiable. This 180 degree F auto reset limit switch serves as a high limit safety cut out, functioning as a normally closed (NC) switch that opens the circuit if the plenum or heating element temperature exceeds the 180F threshold. As a genuine Marley OEM replacement part, it