baxi 105e dhw problem (diagphragm ?)

[bobpm45]

Hi,
When we turn the shower on , there is no dhw.If we then turn on the sink hot tap aswell as the shower , it fires up ! I looked at the plunger on the diverter valve , and it only comes out about half way when the shower is turned on , then when I open the sink hot tap , it pushes out fully and switches it over. I can then turn the sink hot tap off , and enjoy a hot shower as normal as it stays out ! I have cleaned the shower head to improve flow , but its still the same . Could it be the diagphragm faulty ?regards, bob.

 

[mario500]

Yes it's the diaphram - easy mend for competant Diy'er.

 

[bobpm45]

Cheers,
I read on an old post that all i need to do is isolate the water inlet, drain the hot water taps, remove the two 10mm union nuts, undo the two grub screws , and then remove the unit.I have renewed diagphragms at work on compressed air systems .bob.

 

[mario500]

Yes Bob - that is about it.. You will get a bit of water out but just have a plastic container ready. Carefull not to get water on the electrics.

Turn power off to boiler of course.

Good luck fella

 

[bobpm45]

Many thanks ! I'm on the case !!