vokera linea 24 hot water problem

dope · 9 Nov 2006

continuing on from my other posts, i have cleaned the heat exchanger but to no avail, so i bought a new one but still the problem persists. any new ideas?

another problem, when i turn my cold taps on or flush the toilet the boiler kicks in, this has not just started happening its been doing it for a while. is it a diaphragm problem or something else.

your help is much appreciated.

Bamber gaspipe · 9 Nov 2006

The flow switch at your boiler seems to be kicking in when you use the cold water main for flushing bog etc.

dope · 9 Nov 2006

this may sound stupid or obvious but i can get hotter water from my taps if i have other cold taps running at the same time.

scatmanjohn · 9 Nov 2006

Don't keep starting new posts.

It gets confusing.

dope · 9 Nov 2006

sorry for the confusion but do you know the answer to my problems?

Gasguru · 9 Nov 2006

If the boiler fires up when using the cold taps there is probably a dead leg section of pipework. This is usually an old length of pipework not in use that contains air. As you use the taps the air trapped air (under pressure)causes the water to flow through the boiler hot water sensor.

Locate the pipework (sometimes the old cylinder vent pipework) and remove it or fit a vent to bleed out the air. Alternatively a strategically placed non-return valve should sort it.

As for the other problem: When you turn the cold taps on you reduce the flow of water through the combi to the hot tap. Therefore the water heats up more.

dope · 10 Nov 2006

thanks very much for your help, will locate the old pipework now.

scatmanjohn · 10 Nov 2006

dope said:
sorry for the confusion but do you know the answer to my problems?

To be honest it would be a guess without being stood in front of the boiler armed with my mutimeter/digital thermometer/flow cup etc etc.

So i will bow out of this one.

Sorry

Agile · 10 Nov 2006

As he posted a new thread I dont know the background.

There are many other reasons why the Linea may be giving poor DHW performance apart from a blocked secondary heat exchanger.

A clue might have been given by the colour of the water which came out when it was drained.

Finding boiler faults can involve gathering many clues before ariving at a deduction.

Tony

dope · 10 Nov 2006

if it helps any the water was a very milky colour, thanks for keeping me in mind and coming up with more possibilities.

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vokera linea 24 hot water problem

Bamber gaspipe

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