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Vokera combi boiler, no hot water, only heating?

I have a Vokera maxin 24cf combi boiler that is about 5 years old. I am not getting any hot water when the hot taps are turned on, unless I have the heating on as well.

As soon as the heating goes off the hot water from the taps just turns cold again.

I checked out the gauges and noticed that the pressure gauge had dropped into the red, so I turned the screws at the flexi hose to bring the pressure back up, but still I have no hot water at the taps unless the heating is on.

Does any one know what the problem could be ?

Any help or advice would be greatly appreciated.

Richard Murray
September 2005

Vokera Heating, Home Heating Systems Combi Boiler Hot Water Taps

I have exactly the same problem. My boiler is covered by Domestic and General appliance insurance. The engineer has just replaced significant parts, but the problem still persists and the engineer says that he is baffled as to the source of the problem. Im not sure yet how he insurance company will resolve this matter. They may pay the maximum under the policy, in which case I will simply replace the boiler.

I have my vokera boiler since august 2004. My wife maintains that the boiler never fully functioned from day one. Other people tell me to never buy a vokera boiler, but it is too late.

Ben Conway
February 2009

It is not necessarily the diverter valve , it could be the flow switch on the dhw inlet pipe, if one is fitted.

Phil
April 2007

It is not necessarily the diverter valve , it could be the flow switch on the dhw inket pipe, if one is fitted.

Phil
April 2007

sounds like the diverter valve has gone ull need to change it and it can b quite hard to get into on some boilers .

fitter
September 2005