Isomac Boiler Thermal Fuse - I5363014 control-board The expansion valve (also called

The expansion valve (also called an OPV — over-pressure valve) regulates pump pressure during espresso extraction

Fitting: 1/4" BSP

The control board is the central electronic component managing machine functions including heating element control

The 3000W output ensures your machine reaches brewing temperature quickly and maintains consistent heat during high-volume service periods

Isomac Boiler Thermal Fuse - I5363014 control-board The expansion valve (also calledIsomac Boiler Thermal Fuse Safety Replacement The thermal fuse (also called a thermal cutout or high limit switch) is a one time safety device mounted on the boiler of your Isomac espresso machine. If the boiler overheats beyond a safe threshold due to a failed pressurestat, low water, or other fault the thermal fuse blows permanently, cutting power to the heating element to prevent damage or fire. Once blown, it must be replaced; it cannot be reset.