Marley Engineered Products 4520-2027-000 Manual Reset Limit Switch - 150F

The Marley Engineered Products 4520-2027-000 is a manual reset limit switch designed for electric heating systems, including baseboard heaters, unit heaters, and forced air furnaces. This critical safety component monitors temperature within the heating unit and automatically shuts down the system when temperatures exceed safe operating levels.

Key Features:

• 150°F maximum temperature rating for reliable overheat protection
• Manual reset design requires physical reset after activation for enhanced safety
• Designed for Marley, Berko, Qmark, and compatible HVAC heating equipment
• Compact, lightweight construction at just 0.13 lbs
• OEM replacement part ensuring proper fit and function

This limit switch serves as an essential safety device that prevents damage to heating equipment and potential fire hazards by cutting power to the heating elements when excessive temperatures are detected. The manual reset feature ensures that the unit cannot restart until the switch is physically reset and the underlying cause of overheating is addressed. Commonly used in residential and light commercial heating applications where reliable temperature protection is critical.