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Valient combi boiler is not heating the water properly

Central heating is fine, but am not getting any hot water...luke warm. engineer thought it may be a diverter valve. has replaced it but still no hot water. he now wants to replace the heat exhchanger...all this is costing me £500 and still not guarantee that it will solve the problem. What should I do? continue with replacing the heat exchanger and take a gamble that it will work or replace the boiler? the boiler is only 6 years old.

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Vailant boilers are one of the best on the market and should last you more than 6 years depending on installation and servicing.
the engineer you had should not have replaced the diverter valve if the boiler was firing up when the taps are opened. if you was getting luke warm water with the boiler alight it is a classic symptom of a blocked plate heat exchanger on the central heating side.
a new heat exchanger can cost around £100 depending on the age and model of the boiler.alteranatively it could be descaled but may clogg again. it would be a good ideal to fit a magna clean filter on the system to help prevent further debris if you have a dirty system .if you don't trust your engineer i suggest you ask another. find out if he is registered first and don't pay until you are satisfied with the work. if you are asking the same engineer back try and get a discount off the work as he has failed to rectifiy the original fault and fitted the wrong part due to wrong diagnostics. if he is registered you can complain to the governing body ie corgi or gas safe register.
good luck.

Posted on Mar 30, 2009

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