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My parents have a Vaillant Ecotec 831 boiler. Has continually broken down ever since it was fitted nearly 2 years ago. The guy who fitted it keeps coming out and it works for a few days then packs in again. Any ideas what the problem might be? My parents are elderly and look after my handicapped brother and with winter coming on I want to get it sorted out for them. Any advice would be gratefully received. Many thanks.

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Get vaillant to look at it. It could be installation fault. Their advise is impartial and they can advise if boiler can be repaired.
devinder
Corgi engineer

Posted on Oct 28, 2008

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1 Answer

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David,

The fact that you're getting a little burst of domestic hot water suggests that the boiler is capable of circulating hot primary loop water through the heat exchanger, but doesn't necessarily do so when it needs to.

What seems to be lacking is a recognition that domestic hot water is now being drawn off, and that the boiler needs to fire up and divert the primary flow through the heat exchanger.

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