Description
Marley Engineered Products 4520-0015-000 Auto Limit Switch is a temperature-actuated safety control component used to operate within a range of 96-165F. It responds to rising internal temperatures by changing its electrical contact state to protect heating equipment from overheating conditions. In HVAC systems, it is installed in unit heaters and electric heating assemblies where it monitors discharge or internal air temperature and regulates circuit continuity to maintain safe operation. It helps ensure controlled shutdown and restart when temperature conditions move outside safe operating limits supporting protection of heating elements and surrounding system components during continuous operation.
