Problems with combi boiler

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9 May 2006
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Glasgow
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Vokera Compact 24 (Gas), non condensing with a few problems.

My mum’s boiler has been playing up for a while.

The pressure continually rises; even when the boiler is cold, sometimes it goes up to 3 and in the red. This causes the PRV to leak outside, sometimes its hot water leaking and it can be really bad. Also the pipes vibrate when running the hot water. The water from the hot taps can sometimes be discoloured, like a light brown colour.

I got a plumber, out who my mum knows, he said that it was the expansion vessel that was the problem, so he replaced it with a new one and she thought that was it, but all the same problems still occur, infact the water seems browner.

My mum phoned him up and he is now saying it could be the heat exchange that could be the problem. But he still has not told her whets causing the pressure levels and water discolourisation.

Can any plumbers on the forums advise me to what the problem could be? Is my mum’s boiler faulty, she still gets hot water and central heating? Her boiler is a Vokera Compact 24. My mum is 74 and I would like this problem to be sorted.

Is it worthwhile phoning this homefix number with British Gas?

She has signed up for this Homecare 300, she has not arranged for the engineer to come out to inspect the boiler, but I know they will not give her a contract because it will fail the checks.

Thanks, I hope I have supplied enough info.
 
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It sounds as if your secondary plate heat exchanger is leaking. Thats pretty rare but it does happen sometimes.

Since heating water is getting into the hot water there is a potential health issue so it should be looked at sooner.

Best if you contact DP who posts here as he specialises in Vokera. See his profile or look up Ranoch Services in your local telephone books.

Tony Glazier
 
Agile said:
It sounds as if your secondary plate heat exchanger is leaking. Thats pretty rare but it does happen sometimes.

Since heating water is getting into the hot water there is a potential health issue so it should be looked at sooner.

Best if you contact DP who posts here as he specialises in Vokera. See his profile or look up Ranoch Services in your local telephone books.

Tony Glazier

So this is causing the brown water and the pressure levels to increase.

Thank you for the reply.
 
Sound more like the main heat exchanger..this boiler does not have a secondary plate heat exchanger.
 
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OK then, the main heat exchanger if thats a "four pipe".

Thats a rather more expensive bit!

Tony
 

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