Baxi 105 hot water problem

[owington]

Hi,
I have a problem with the ho water on a baxi 105. The central heating works fine but the hot water is only lukewarm. After running the heating for a while the water starts to come through the taps hot for a short while. The pressure is also dropping and requires topping up every other day or so. The pins are moving both micrsowitches so i dont think the diagrpham is split. Is this correct and can anyone offer advice.
Thanks

 

[fixter1]

check see if flow pipes getting hot when hot water is on

 

[owington]

Ok, its a friends boiler so not at the house at the moment. If the flow pipes are getting hot on hot water only what will point towards? Thanks

 

[AllyBongo]

Dirt in the divertor. Take the HW manifold off, then unscrew the front of the divertor. The pin will probably be dirty, therefore not closing off the CH port properly. I had a post a while back on here with the same problem. Someone (Puddle I think) put on a few photos of the manifold and divertor stripped down, see if you can find it, it helped me out a lot

 

[AllyBongo]

http://www.ukplumbersforums.co.uk/central-heating-forum/24313-baxi-105e-hw-problem.html

Found it mate!

 

[owington]

Cheers mate, ill give that a try. Were you also getting a loss of pressure in system?

 

[AllyBongo]

No. That sounds like a different problem

 

[owington]

Yeah thought so. expansion vessel is at right pressure, no drips from PRV and no sign of a leak anywhere. Hate doing jobs for mates. Anyway cheers for your help mate

 

[fixter1]

allybongos hit the nail on the head mate..dead simple to do