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Don't know yet. The plan is to identify the most likely cause, then find a way to test it!

Hi, I have a Baxi 80 HE Plus. Over the last few months, it has started to produce an Ignition Lockout fault. Baxi fault finding suggest the following possible causes; 1) Gas supply problem 2) Condensate trap blocked or water on terminals? 3) Spark or flame detection probe damaged 4) Is...

It is not possible for the leak to be going into the DHW then. Any other suggestions? P.S. The diaphragm was streched and split on my Vokera combi. I've fixed it and now. No more cold showers!

But how could you tell if the DHW pressure was increasing? Is this possible anyway? The DHW system would have to be at zero pressure at the point where the CH was leaking into it :?:

Thanks for the reply. There are no signs of water escaping from there.

My dad's RAVENHEAT RSF 820/20 COMBI, is losing CH pressure with no signs of leakage from the boiler or pipework. The pressure needs to be re-primed by the filling loop approx. every 48 hours. Is it possible its escaping into the DHW? Any help is greatly appreciated.

Have just found the remains of a diverter valve gasket set with some useful looking bits in. Seems this has happened previously. Is this a simple enough job for the DIYer :?: Thanks again for your advice.

Yes, just found it! There is a three port diverter valve referred to. Is this the one? P.S. Model is Vokera Excell 80 SP. Many thanks.

Is this a DIY or professional repair? Many thanks for your speedy response!

My Vokera Combi Boiler no longer produces demand hot water when the central heating is off, however, it will produce DHW when the CH is on, but to get this water hot the tap must be throttled down low. Any help would be greatly appreciated.