Hi, I have a two year old Ideal Instinct boiler that has been problematic for about a month with low pressure. A plumber came out twice and reset it and it seemed ok but its started loosing pressure again a couple of days ago. He has been back and blown something up in the boiler which he thought would sort it but within half hour it had dropped again. It is currently working on continuous setting but it won't come on in automatic mode and I'm starting to get problems getting it started if I turn it off. The plumber is too busy to come back and going on holiday tomorrow so I'm in a lather as I need it sorting for Christmas!! there are no obvious leaks anywhere. any advice appreciated.