Marley Engineered Products 4520-2017-000 Limit Switch Els PW 17895 Always verify the valve stem

Always verify the valve stem diameter matches the coil's internal bore before installation

Unused primary wires should be safely capped with wire nuts or heat-shrink tubing to prevent accidental shorting or contact with the equipment chassis

ensuring identical electrical and physical mounting

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Marley Engineered Products 4520-2017-000 Limit Switch Els PW 17895 Always verify the valve stemThe Marley Engineered Products 4520 2017 000 Limit Switch is a critical safety component designed for high temperature HVAC equipment diagnostics and protection. This 300F M R Limit Switch features a manual reset mechanism, ensuring that once the thermal threshold of 300 degrees Fahrenheit is reached, the circuit remains open until an on site technician can inspect the system for the underlying cause of overheating. Engineered for reliability in