Observation:

Tests show that the fuse has blown.
Fuses may blow through fatigue or it may indicate a further fault.
Please select from the options below if you wish to investigate further or you wish to just change the fuse.
Further investigation fuse blown (recommended).

Fuse blown through fatigue.

Note:
As systems differ in design this fuse investigation cannot diagnose problems external to the appliance
(e.g. electrical problems with diverter valves or programmers)
.