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PostPosted: Sat Dec 15, 2018 3:41 pm 
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Hi there, as my utter desperation I will post my issue here, perhaps someone already experienced something similar and can direct me to the right person.
Christmas is upon us and instead of dealing with festivities, I am trying to self-learn about boilers.

WE have 10 years old Vaillant Ecotech Plus 824 boiler. About 3 weeks ago we noticed that when we are in the shower the hot water tends to turn cold after about a few minutes (it was enough hot water to get soap all over yourself but as you try to wash it off, the water was already cool.)

I got in touch with our home emergency insurer and they sent a heating engineer to fix it.
He visited us several times and changed the following:
1. Diverter valve
2. Flow change switch
3 Plate heat exchanger (after he changed this, he experienced leaking inside the boiler and had to shut off the boiler completely leaving us without heating for a few days)
4. Flow return pipe (which stopped the leaking)

Heating now works fine (as it did before he came) but we still do not have hot water. (our insurance cover of £1000 now run out completely and the insurer just sent me a text saying that my claim is now closed as the situation stabilised by the engineer. :angryfire:

Before leaving us, the engineer suggested that it might be something wrong with the mixer taps and stated that the boiler is now working. :wtf: (or potentially the circuit board needs to be changed so maybe it is not working :? )

In the kitchen we changed the tap about 5 months ago, yesterday I managed put the tap in a particular position I was able to have hot water for 5 min+ . I tried the method again but it was not working today.

Upstairs in the bathroom the sink taps (separate hot and cold) are temperamental in terms of pressure. E.g If we flush the toilet, the flow is very low until the toilet tank filled completely.
In the bath we have a mixer tap, but again no hot water. (never experienced any problem there)

Could it really be the tap? or something still wrong with the boiler. (I have received now quotes to get a new boiler, but the engineer specifically said that he "cant say that we need a new boiler because it might be the taps" )
Thank you so much for your input :thumbleft:

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PostPosted: Sat Dec 15, 2018 5:29 pm 
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I am not a heating engineer but I can sympathise with you, we had a similar situation.
The insurance company sent out people who were cheap (to them) and had no idea what they were doing, (Some times you can just tell) we gave up and called in British gas, been with them ever since.
Others will say find a heating engineer and stick with them, my mother did that, after a few years he stopped answering the phone....
I am not saying British gas are cheap, but they do the job.

(Would never recommend them for a new boiler, they often get subbies and are way OTT)

Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

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PostPosted: Sun Dec 16, 2018 11:05 am 
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I did have a similar issue some years ago. Hot water was luke warm at best. Tried obvious fixes on boiler, heat exchanger etc but to no avail.
In the end it turned out to be the mixer shower assembly. It was allowing cold water to effectively dilute the hot water. Try disconnecting your shower and see how long your hot water lasts. More than 5 minutes?

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PostPosted: Sun Dec 16, 2018 11:41 am 
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Give British Gas a ring, OK I know everyone slags them off but they do sort out most things I think they still have a fixed fee to carry out a repair.
Both my daughters and I have contracts with them (they also covered my rental properties when I had them) and have had very few problems, just once had a little lad who was younger than the boiler so he had to ring for help! :lol:
Taking a punt with someone from a trade list means you are stuck with him, at least if you do happen to get the one local BG idiot you can ask them to send someone else!
Just take the "a new boiler and a flush will solve your problems" with a pinch of salt, although sometime it can be true :-)

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PostPosted: Thu Dec 20, 2018 7:00 pm 
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When you first noticed the problem it was with the shower only ?? Yes/no ? all other hot water outlets working normally ???

If that is the case then the initial problem may well have been with the shower valve, no need to touch the boiler.

More info please.

Verwood Handyman

Verwood Handyman


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