I can diagnose and repair problems to most boilers and central heating systems. Parts for most of the major boiler manufactures can be obtained on the same day but for some of the more unusual parts may take a couple of days arrive.  It is useful if you could let me know the make and model of the boiler and if it has a digital display if you could make a note of any error message. I carry manuals for most of the main range of boilers but on some of the cheaper import boilers these can be hard to come by if you don’t already have a copy.