Corroding joint / pipe / heat exchanger

[ChrisR]

it aint rocket science removing half a dozen screws and replacing them

Mistaken assumption.

On some boilers you'd be risking a carbon monoxide poisioning if you did that. And you'd never guess why.
There's always more to anything than there looks at first.

 

[kevhky]

Fault finding is another ball game. If you are that clever, I wonder why you are asking questions in the first place.

Your right, fault finding is another ball game and thats why i came on here to ask you all to help me find the problem which i greatly appreciate.

Kev

 

[kevhky]

Boiler engineer been out

new parts ordered MHE and ins pads

Result

thanks once again to everyone

Kev

 

[kevhky]

New Main heat exchanger fitted last week through the insurance, never lost a drop of water since then

Only wish id checked inside the boiler berfore i ripped up floorboards / carpets, this is the first place ill look in future

Kev

 

[petit_pablo]

New Main heat exchanger fitted last week through the insurance, never lost a drop of water since then

Only wish id checked inside the boiler berfore i ripped up floorboards / carpets, this is the first place ill look in future

Kev

For futue reference its safer to shut off the boiler isolation valves and leave off for 24hrs. If pressure drops leak is in boiler, if no pressure drop its on the pipework/system

 

[Agile]

I do have to say that I have changed more leaking main HEs on Vokera boilers than any other make of boiler.

No very obvious reason though!

Tony

 

[DP]

I do have to say that I have changed more leaking main HEs on Vokera boilers than any other make of boiler.

Tony, in that case you will have no problem answering following questions.

1) What is the noticeable (manufacturing) difference between Flowmatic, Excell and Linea 24/ 28 main heat exchangers (termistor tapping apart on the Linea)

2) After the HE has been replaced, is there any problem or difficulty replacing remaining components on above boilers models and if yes, what is it?

3) Which of the two Flowmatic or Excel HE tappings is slightly angled

 

[Agile]

I dont remember that much detail about the ones I change and certainly dont place different models side by side to compare them. I may be a boiler anorack but not that much!

I dont think I have changed the HEs on any of those models. It seems to be mostly the heat only models I go to but that is probably only by chance.

Do you have any idea why Voka HEs seem so likely to leak? Like the OPs, I think all of mine have been the right hand side too!

I dont see any particular difficulty putting the boilers together as long as i have my long reach PD2 and have magnetised it recently.

Tony

 

[DP]

I dont think I have changed the HEs on any of those models. It seems to be mostly the heat only models I go to but that is probably only by chance.

Also

I do have to say that I have changed more leaking main HEs on Vokera boilers than any other make of boiler

Above gives the impression the count runs to hundreds of Vokera HEs changed

I thought combination boilers far outnumbered the heat only boilers. Then again, HE construction is no different for heat only or combi boiler.

I dont see any particular difficulty putting the boilers together as long as i have my long reach PD2 and have magnetised it recently

I am not surprised the screwdriver has to be magnetised. Phillips driver is the correct tool for the screws on the Maxine, Linea, Excel etc.

 

[Agile]

I think that I have changed four Voka heat only boiler main HEs. Odd you have also found that type to be the ones that fail most. There must be a reason as there is only one heat only for about 25 combis.

I can only remember changing three leaking low water content main HEs on other combi makes.

Tony