Hydrotherm BM-3336 Insulated Base Door As part of the PopTop

As part of the PopTop series

monitoring the heat exchanger temperature to prevent unsafe thermal conditions

providing essential overcurrent protection for downstream controllers and actuators

In a normal operating state

This is a manual reset switch

Hydrotherm BM-3336 Insulated Base Door As part of the PopTopThe Hydrotherm BM 3336 Insulated Base Door is a critical OEM replacement part engineered for high performance thermal containment in Hydrotherm R Series boilers. Designed to fit Model R gas furnaces, including the R 180C, R 210C, R 250C, and R 300B, this insulated boiler door features a steel frame and high density foam insulation to mitigate heat loss at the unit's base. Implementing a Hydrotherm BM 3336 ensures energy efficiency by maintaining