Mira Zest cutting out

[BenW1973]

I have a Mira Zest electric shower - about 4 years old - and it has just started to cut out after about 5 minutes of use.

I've checked the wiring connections and nothing is burned out.
I've checked the inlet filter which is fine.
I'm not running the shower excessively hot - i have the same problem running it at luke warm.
I've checked the shower head which isn't blocked (we don't have a big limescale problem).
It's not tripping the fuse.
The water pressure is fine.

Any suggestions? I know this topic is well covered on the forum, but i'm pretty sure that i've tried everything that's been recommended so far.

 

[Whitworth]

If its anything like my Mira Sport there will be a thermal trip on top of the heater. Could be faulty and is replaceable. Have a look at some of the shower spares suppliers online, they show a schematic with parts etc.
Always isolate supply and double check with multi meter before working on electrics!

http://www.showerdoc.com/shower-spares/mira/MIRA-PARENT-26-Mira-Zest---Post-2003

 

[seco services]

it has just started to cut out after about 5 minutes of use.

cutout as in what heat, just the water flow, or complete power failure ?

i would say you mean just water flow.
if so the solenoid coils faulty. check the resistance on it in its failed state.

as for the tco faulty they will only stop the water heating. not cause a flow fault.