boiler servicing

New on here, so hope I'm posting this in the right section.... I have an Atmos Multi 24/80+, which has performed brilliantly since it was installed 14 years ago. One issue - the local company who has serviced it in the past no longer covers Atmos, and I've drawn a blank on finding someone who...

Hi, My Vaillant 20/1 T3 was turned off for the best part of a year, when tuning back on I noticed a small leak on the Expansion vessel, but the boiler fires up fine for Heating & Hot Water, However, when turning up or down (settings 1 - 8) the 'Flow Switch (mounted on the front, inside cover)...