A: Check the hose for kinks or any jnternal obstructions, this can be best checked by removing hose and running shower without, if shower then ok replace hose.
If problem still there then

I think you may have a faulty Thermal Cut Out

A faulty TCO will have no continuity across the two terminals (The black thing on top of the heating tank)

Therefore a good TCO will have power at both connections and a faulty TCO will have power at only one.

(The function of the TCO is, if the water over heats it cuts the power off to the elements

Alastair

Answered 65 days ago | Alastair

A: The solenoid valve has failed open and needs replaced, it can be ordered online by clicking on the link below.

http://www.showerdoc.com/shower-spares/triton/TRITO-83300450-Solenoid-valve-assembly

Alastair
Answered 60 days ago | Alastair

A: If your problem is lack of water then it is likely to be the solenoid coil at fault. If you click on the link below it will take you to a video clip showing how to check and replace, and allow online ordering.

http://www.showerdoc.com/shower-spares/triton/HYDR-27600-Universal-Solenoid-Coil-(No-Valve)

Alastair
Answered 59 days ago | Alastair

A: 

It may be your solenoid valve, you can check it if you have a multi meter, you should have a reading of at least k3.5 ohms, across the two terminals any less and you need a new valve. (Check the valve in the failed state.) (When it is not working!)

If there is power getting to the solenoid and it is not operating then there is a good chance that you have a faulty solenoid.

If you don’t have a multimeter we sell them with a guide on how to use them for checking and testing the various parts of your shower.

Apart from helping to fix your shower, they are really useful for checking you have a power supply to appliances, for checking fuses and letting you know much power you have left in batteries

(So you will know if they are good or not) and lots of other jobs, in short they are well worth a few pounds

http://www.showerdoc.com/installation/electrical-products/SKYTRO-600-005-Digital-Multi-Tester

Here is the link to the solenoid.

http://www.showerdoc.com/shower-spares/triton/TRITO-83300450-Solenoid-valve-assembly

Answered 82 days ago | The Doc

A: 

It may be a faulty element in the heating tank (there are two, three in 10kw showers) you can check them with a multi meter you should have a reading of around 12>18 ohms.

If you have power to the elements and no heat it's probably the elements, no power to the elements then it's probably a micro switch.

If you don’t have a multimeter we sell them at £10 each with a guide on how to use them for checking and testing the various parts of your shower.

Apart from helping to fix your shower, they are really useful for checking you have a power supply to appliances, for checking fuses, letting you know much power you have left in batteries

(so you know if they are dud or not) and lots of other jobs, in short they are well worth the £10.

http://www.shower-warehouse.co.uk/erol.html#55x878
Answered 20 days ago | Alastair

A: 

The things to check first are.

1 That the main valve coming into your house is fully open.

2 Then check that the valve on the line to the shower is fully open.

If these valves are not fully open then there may not be enough water
getting to your shower to cool it properly the overheat safety device will turn
the power off until it cools Then it all starts again

Make sure that the shower head is clean and clear, that the hose isn’t kinked (this can happen just behind the hand set where it is difficult to see) also check the inside of the hose although it can look OK on the outside it could have collapsed internally

The other possibility is a faulty flow/stabilizer valve not allowing the correct amount of water into the shower.

A ruff check is to remove the shower head turn temperature control to fully hot the water coming out of the hose should be a bit more than a dribble then turn to fully cold and it should be coming out at full flow.

If there is not much difference between the two then you could have a faulty flow/stab valve.

Answered 18 days ago | The Doc