Question about Water Heaters
I have the above Boiler approx 6 years old. Keep getting a 3Y error code come up which locks out the boiler. This code is stated in the manual as being a fan fault. The boiler repair guy agreed and I bought a new one which he fitted but the fault remained. He then said it was the DBA. I bought a new one which he fitted and still the fault remained. I have no faith in his diagnosis now. Tech support state it can't be anything other than these two items but surely it has to be. Though the fault code is consistent when it goes faulty it pretty much only does it on the central heating side and then only when the temperature is reached. It will do it on low flow on the hot water side too. So could it be either the flow sensor or temp sensor or even just the flow rate is too low?
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Posted on Jan 02, 2017
is this a baxi 105? chances are you diaphragm has gone on your diverter valve. Or your diverter valve.
Do you will initially get a liitle hot water if your heating is on?
Posted on Dec 30, 2008
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.
Posted on Mar 30, 2009
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