Baxi 80e CH pressure rises

[Kes1971]

Hi,
Baxi 80e. Some how the water is getting into the CH from the DHW i have to turn off the cold water supply to the boiler (at the tap under the boiler) if this is left on the pressure slowly rises and I have to drain the CH system back to 1 bar. The diverter valve assembly was replaced recently but did not fix the problem.
When running the DHW the supply fluctuates from hot to cold (making having a shower impossible!), I'm thinking this might be the DHW heat exchanger needing to be cleaned out but will this have anything to do with the pressure rising?
Any idea's anyone?
Thanks
K

 

[baxpoti]

You need part No. 248047

 

[Kes1971]

Thanks for the quick reply,
getting a new heat exchanger i think is the way to go to sort out the temp fluctuating but will that stop the water getting into CH system as i'm feed up with draining it every day, I thought that it was a closed system so how could the DHW fill up the CH system with out the filling loop attached? I'm confused
K

 

[baxpoti]

yes this will cure the problem

if your doing it yourself order 4 x 248049 seals

 

[Kes1971]

Thanks, i'll get then ordered, good call on the rubber seals.

 

[Kes1971]

Worked a treat. My boiler is very well behaved now and it only took about an hour to do. Thanks again for your help.
One very happy DIYer