Baxi 105E Pressure keeps rising?

[machapman001]

Hi,
I've got a Baxi 105e combi instant noticed the boiler pressure had gone to 3 bar , the relief valve is doing its job and the filling loop is uncoupled any ideas?

 

[Burnerman]

It sounds like the DHW heat exchanger is leaking into the CH system unfortunately.
John

 

[machapman001]

So it couldn't be diverter valve (i'm just hoping thats all) or split diaphram

 

[Burnerman]

I'm sorry I don't think so.....if water is exiting the system via the pressure release valve, and the filling loop is disconnected, the water incoming has got to come from somewhere - you get my drift?
The diverter valve just allows you to have a choice between CH or DHW, and the expansion vessel allows for hot water expansion - as it is a sealed system.
John

 

[machapman001]

Ok, i thought it may be, but didn't want it to be, thanks for your help any ways.

 

[namsag]

Make sure you order the one for the instant and not just the 105e they are different costs around £60