I may be an experienced marine engineer but when it comes to servicing domestic boilers and fitting a digital programmer unit I would rather employ someone who has the necessasy test kit and does this sort of work for a living. The flushing of the system should be quite straight forward but...
I have a trianco eurostar oil fired combi boiler fitted with an expansion vessel. All seems normal and operating fine, however every few days I find the system gets noisy on start up with air collecting in the radiators. How can this be if the system is pressurised to 1.5 bar and I can find no...