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If I knew at the start it was the HE, I think I would probably tried one of the fixed price repairs, I keep hearing the advert on the radio, it's driving me mad!!! :P Thanks for the advice, it's good to know I was unlucky, sounds like you have been too. Hope you get yours sorted too.

That's exactly what the gas engineer said, that I was very unlucky. he also shopped around and found the heat exchanger for £360, which seemed like a good price, just not an expense I was expecting. He also replaced the rubber hoses for the copper ones, so finger crossed I should be ok for...

Boiler all fixed now. But had a shock when he found that there was 2 hairline cracks on the black plastic part of the main heat exchanger!! :cry: So he had to replace the whole heat exchanger!! Really losing faith with Vaillant, what with the replacement copper from rubber hoses and...

That's great, thanks for putting my mind at rest. He is booked in for later in the week. I guess as there have been no comments about replacing the rubber hoses, then it seems fair enough.

Gas engineer has visited for a quote, and he has agreed that it looks like the o-ring, but has advised to also replace the rubber hoses on both pipes, as work is being done there and they are a prone to burst (bad design). Although the rubber pipes look ok he said they probably wont last as...

I hope not! :shock: Thanks for the advice, I'll call the company that serviced the boiler.

Thanks for your reply, but removing combustion chamber? I'm removing the air inlet duct.

Yes it does.

Hello everyone, I have a small leak on my Vaillant ecoTEC plus 834, it is on the connection pipe where it goes out of the heat exchange. I assume that the o-ring has deteriorated and needs replacing. Would you kind lot be able to offer me some advice on how this is done? I would like to...