i have a vaillant combi bolier ref no vuw242 I have had this for about 12 years and now have a leak the water pressure has not dropped but quite a lot of water is leaking from the system. I have had a plumber around who thought this could be repaired by putting some central heating solution through the radiators but this has not worked. I dont want to be ripped off by calling around another engineer and wonder what part needs to be replaced if applicable or do I now need a new boiler any idea what part needs replacing or where to look

helen sanders, March 2012

Where is leaking ,from over heat pressure valve outside ,you can replace or from heat exchanger you can still buy any part for that boiler

ltd, March 2012