Hi,used to sub contract for BG. Some of their subbies are not very good , also their own guys are so rushed they cut corners. The service thing . the boiler if running clean and correctly according to set combustion limits doesn't need cleaning .its like a car engine , you don't want boiler engineers opening up the boiler and disturbing seals unless they need to , the boiler issue could be the programmer faulty or the boiler PCB .
Thank you for your prompt reply. The programmer was replaced 3 years ago and hasn't been of any obvious cause for concern, whilst the PCB is the original. I will suggest it be replaced when I make a booking for a follow-up visit tomorrow. This would be in line with the service engineer's suggestion 'that if their is still a problem after a week to allow the new components to bed-in then call him back. Regards ***** *****