H4 thanks for the quick response.
there does not appear to be any unusual noises.
as for the warranty i was led to believe the warranty only lasted 2 years if the boiler was serviced 12 months after installation (which i never got done, i wish hadn't got it done this time as well now)
i have aproblem which started after i had my boiler serviced. basically whenever i try and run a bath the boiler trips. it works fine when central heating only.
i have had the engineer back out and he reckons the problem is due to the incoming mains water temp being too cold!!!!!
there have...