Thanks for your reply Rob. It was a new boiler fitted with existing radiators,which I dont think the fitter flushed out the system. Ihave checked and checked again for leaks and cannot find any evidence.I think it takes about 3 to 4 hrs to go down to zero
I have an Ideal Logic 30 boiler which is only 4 months old. Recently the pressure has been dropping to zero when the heating is switched off. I have cheked all the radiators and tey are all hot and no air in system, no bleeding required . I called out the Ideal engineer and he examined boiler...