New Vaillant Boiler Making Clicking Noise

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Hi guys
I had a brand new vaillant ecotec pure 830 fitted about a month ago, and I’ve noticed it makes a very weird clicking noise whenever the hot water tap is run in my bathroom, or when the heating first turns on. I wanted to know if this is normal? It’s not the pipes heating it / expanding, it sounds more like a switch turning on and off repeatedly - goes on for around 1 minute. My last vaillant didn’t do this so it’s very annoying as the boiler is in the kitchen next to where I’m working.

heres a video (note the first noise I think IS the pipes expanding.. which I guess also needs attention?):

I will call vaillant to sort but I don’t want to if this sort of thing is normal...

Thank you
 
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No it is not normal , and it isnt heat expansion, you need to get them out
 
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No it is not normal , and it isnt heat expansion, you need to get them out
Thanks for the reply. I called them out - they came today and he said it is the pipes expanding / contracting when the boiler is heating up or cooling down. He took it apart and tightened the nuts, it hasn't done it since. He said it's a design fault (wow) that they've never fixed. Shocking really... Just posting this so people know for future if it happens to them. apparently it's unique to my boiler model.
 
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So, it WAS heat expansion! Good job you spoke to someone who new what they were talking about.
 
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I'm aware this is an old thread but Google brought me here as I have the same boiler with exactly the same clicking sound. It sounds almost like the ignigter continually trying to light. It was installed in August 2021 so it doesn't look like Vaillant are too concerned about it. I'm not sure if it's worth calling out the installer under warranty (British Gas) or not?
 
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@John_ON is your clicking noise resolved now? If so is your boiler as quiet as a mouse now? It’s just that I have a clicking noise but it roughly click once every 15 mins or so. And I have no idea what to do
 
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I'm still waiting for the British Gas HomeCare engineer. They cancelled one appointment last week and are (hopefully) coming next Thursday.
 
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Had the same boiler installed july 2022. The clicking noise appears after using hot water for a longer period (dish washing / running shower or bath). It appears around 5-10mins after switching the water off. Called Vaillant, engineer came, did smth with the 4 bolts. Noise is still there but intervals are longer and last shorter time. Called again, same guy came, had a look and said there is nothing can be done, it is a normal expanding/collapsing of metal. Boiler is in perfect condition, works perfectly etc. I sent him videos of clicking and he said he will show it to the guy above him and see what he says.
So i have to get over it i guess and at the moment accept it as normal sound ...
 
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Hi,
I'm a tenant and the previous boiler broke. Called the estate agent and the plumber came and installed this same model. I have the same issue with the noises. It's very annoying, especially during the night when it's quieter and the cracking/clicking will take over the whole house.

So I have made a complaint with the estate agent and the plumber who installed came in today. He wasn't happy about my complaint. He said he was going to tie some bolts but he couldn't see anything obvious and said "it is doing what is supposed to be doing".

Yeah of course he doesn't have one of those at his home I assume.

I don't want to be the annoying person and bother the landlord with this anymore. But I think they should know that this is a brand new boiler and it is making weird loud noises since it's been installed.
 
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This is an interesting thread. Thank you! Thought I was going mad. Just had an Ecotec pure 630 put in three weeks ago. Terrible clicking noise as described by others. 7 times in a row on one occasion as it fired down. Also a couple times as firing up. Eventually British Gas arranged for Vaillaint to come out. The engineer told me that a colleague had told him the heat exchangers had been bolted on too tight and after he loosened the nuts it does not click BUT now it clunks a couple of times as it fires up and when it is on it whines! (Pump?) My previous boiler just purred - pimp was in airing cupboard. The V engineer said there had been a batch of these clicking boilers and they are rectifying as they go. Totally unacceptable in my view. Did they tell their customers? Sounds to me like it's more than the heat exchanger that is wrong with this batch! I'm so fed up with it after many years of a totally quiet old boiler! Got British Gas manager coming out soon to hear it. Vaillant left the house saying boiler now ok!
 

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