The brass construction is suitable for natural gas

Meets CSA standards

For technicians

The color-coded identification allows for rapid verification during field service

Marley Engineered Products 4520-2030-000 Thermal Fuse The brass construction is suitableThe Marley Engineered Products 4520 2030 000 Thermal Fuse is an essential OEM replacement part designed for high limit temperature protection in QMark and Marley electric heaters. This Therm O Disc MicroTemp thermal cut off is engineered to interrupt the electrical circuit if internal temperatures exceed the critical 144C (291F) threshold, preventing equipment damage and ensuring system safety. As a genuine Marley heater repair part, it maintains the