mira combiforce 415 exposed PROBLEM PLEASE HELP

[bryant]

hiya
ive had this shower for around a year now was going fine until the other day, when turned on its nice and hot for only around 10 seconds then goes luke warm ive tried all the taps in the house and they work fine nice and hot any suggestions ????
would be gratefull

 

[m1key00]

It may be that the pressure on the hot water diapragm in the boiler is not enough to turn on the burner. you may need to replace the diaphragm. The warm water you get at first is a heat plug from inside the boiler when the heating has been on, but then the burner has not lit and all you get is cold water.

 

[seco services]

is the inlet hot pipe staying hot even when shower go's luke warm ?

 

[bryant]

hi rite when the hot water taps are on the burner fires up as it should and when the shower is turned on
the hot pipe is just exposed so i can just touch it gets hot for a few seconds then just stays luke warm like the shower so dosent seem like its getting hot traveling up the pipe
the heating works fine nice and hot its just the shower???

 

[seco services]

then its not a shower issue if the hot pipe is only luke warm.
as already said check the boiler with the shower runing its probably cutting out.