triton opal 10.5kw shower

[Tiler Man]

Hi all my triton opal 10.5kw shower has been running fine, but has know started to shut off, it has 3 settings cold hot1 and hot2 cold and hot1 come on and run as norm with water still warming up on hot1 setting, but switch it to hot2 setting it shuts the water off completly. water pressure seems fine so i not sure whats up any suggestions welcome please.

Many Thanks.

 

[hi-spec plumbing heating]

do the indicator lights cycle as if the unit has just been switched on ?

 

[Tiler Man]

Hello thanks for coming back so quick, i have just switched on shower as it shuts off the power on lights stays on the low pressure light flashes then each setting light flashes.

 

[hi-spec plumbing heating]

as i said the lights are cycling.
pcb is at fault.

 

[Tiler Man]

Thanks for that looks like i will be getting a new one then.