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My Vailant VCW GB 280 H is 17 years old. It has developed a fault with the domestic hot water supply. When the heating is turned off and I run hot water, the pump continues to run afterwards. I have to turn the power off to reset the boiler.

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Posted on Jan 02, 2017

  • 30 Answers

SOURCE: I can't turn the bar pressure up on my Vaillant VCW 221 Boiler

on the pipework below there may be a silver braided hose with one or two valves on the end. turn the valve(s) so the handle is inline with the pipe this will allow water from the mains supply into the heating circuit , remember to keep an eye on the pressure gauge. fill the system to 1bar cold then shut down the valve(s). turn on the boiler and it should be ok, if you lose pressure again then you may have a leak somewhere which needs to be found.

Posted on Mar 30, 2009

mrhotandcold
  • 248 Answers

SOURCE: Hi my vaillant vcw gb 242 e is leaking from the

what do you mean from the radiator TEMPATUTE adjusting control ( thermosatic rad /valve) if so jurt replace valve

Posted on Oct 12, 2009

mrhotandcold
  • 248 Answers

SOURCE: Boiler pressure up at 3 bar and need to try to repressurise

may at the back outside casing can be pressurised by footpump if required

Posted on Oct 15, 2009

  • 17 Answers

SOURCE: Combi boiler (vailant), pilot light not igniting;

hi there

does the fan start up?
sounds like a faulty gas valve. has there been an interuption in your gas supplie?
hope this steers you in the right direction

Posted on Dec 19, 2010

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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.
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