My Triton Rapide R3 shower sometimes works absolutely fine, but at other times it will show 'low pressure' for no apparent reason (it does this is we have just flushed the loo or running the cold water tap, which we have learned not to do while the shower is running), or will be freezing cold, or boiling hot (but ok pressure) and altering the temperature gauge does nothing at all to alter the temperature. It can be fine when the shower first goes on then all of a sudden go freezing cold, or it can take several times of turning the shower on and off to get the shower to warm up or get the correct amount of pressure in the first place. It has always been slightly temperamental but recently there has been a problem the majority of times we have used the shower. It has been installed approximately 20-21 months now. Any ideas would be gratefully received! Thank you.

SOURCE: I cannot alter the temperature

What has likely happened is the insides have scaled up and moving the lever strips the plastic spline in the lever assembly = no control.

Mine usually fails on very hot!

The hardest thing here is turning the hot and cold water off! Do this first. If you are reasonably logical you can do this easily and if in doubt draw yourself a diagram of where things go...

1) Unscrew the silver bolt holding "tap" can do OK with pliers in this (unusual) case. Slide off the tap.
2) Unscrew two screws holding control lever assembly to shower body and slide it off.
3) Unscrew four screws holding cover to shower base. Remove cover and here it is - the insides!
4) Prize off the thermostat
5) Remove roating collar noting the only way it fits and can go back!
6) Whilst the remaining shaft is in the shower - this is the time/position to unscrew the shower tap mechanism - it's the thin nut - jus loosen it for now.
7) Remove the shaft - this is where you get soaked if water is on!
8) Parts may look ok but they will need cleaning: use plenty of descaler, wearing gloves and periodically clean with towelling and pop back in. They should begin to resume their shine.
9) Now you can put back together and maybe if you take the spline out of control lever and turn it 180 degrees you may be able to repair and use.
10) I recommend you replace the plastic spline (£7 + delivery in UK) and replace all the rubber washers and seals (seal kit is around £13-£17 in UK).

Instructions available from manufacturer. Parts plentiful.

If it is all too much it's an easy job for a plumber. At least you will know this...and warn said plumber accordingly!

SOURCE: hi, we have recently purchaed a

try taking the handle off and moving just the stem till the right side has all cold and left side is all hot..this mite adjust the stem