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Could this be my problem Main Heat Exchanger No visible signs of water

Doing this as we speak What do you you mean (sorry for my ignorance) Does this actually work as read it in other posts i seriously thought other members were being sarcastic hahaha althoguh it does sound like a great idea, what about a dye such as food colouring (wont it effect any parts...

Hi after many months of trying to find leak in my combi ch i still have not found it ive narrowed it down to flow/return pipework comming from boiler approx 3m going to upper floor or 4m heading down Ive come across a quite bad corroding joint (pics attached) although im not 100% this is...

Hi, Ive recently drained my system and i need to bleed rads but 3 rads are quite old and have been painted even inside where the bleed valve is. They are stuck solid i cant turn them at all Ive cleared away the paint from around what i can see or could they be seized in as theve not been...

Thanks Jamie much appreciated

Hi ive recently drained down the system and want to be sure there is no air trapped within combi/rads Ive filled it back up and bled all rads and conmbi to 1bar is this basically how its done, would all air in system eventually rise to rads and not sit in pipework/combi Kev

ive done that and not a drop in sight

I let the system go cold overnight, then topped it to the 2 bar, 24 hours later still sittin at 2 bar, both upstairs and down all pipework runs under beams

Prv is dry as sticks outside

No, all under floorboards

This is totally baffling me Combi boiler i top the boiler up (ch) to 1 bar, after around 24 hours the pressure drops to zero (heating running throughout via room stat) I then top boiler up (ch) to 2 bar turn heating completely off for 24 hours and no loss in pressure During this time...

Would this isolator be okay to use in the ch pipework, are they prone to leak as i wont have access once fitted http://www.jtmplumbing.co.uk/compression-40/valves-41/conex-isolation-valves-873.htm Kev

Hi I did this just few months back and works atreat, far better than electric Kev

I have access to the manifold under the floor, what isolater would you reccomend Kev

Hi yes its microbore Id need to rejoin all pipework once i fornd out which was causing me the problems Pipework is 22mm flow and return from combi then manifold to 8mm to all rads i need to find out which rad / pipework is leaking Ive just filled ch system to 1.2bar and turned...

Hi Ive googled but cant find any do they exist PUSHFIT 8mm I still have leak in either combi or pipework, done several checks and cant seem to locate it i want these so i can isolate the pipework under the floor to each rad in turn to hopefully find out which part of the pipework / rad...

UPDATE: Ive checked the expansion vessel and re pressurized to 0.80 bar as per manufacture When the heating is running now it only rises to 1.5bar from 1bar Looks like i certainly fixed that problem, i just now need to check that my pressure doesnt drop like it has been Thanks Tony...

Can you confirm this is the expansion vessel im checking although im certain it is just to be absolute sure http://i298.photobucket.com/albums/mm250/kevhky/Combi/4c2f67af.jpg thanks Kev

Okay Tony point taken, i will look at the exp vessel today cheers kev

Thanks Tony just to clarify When i pressurize the boiler to 1bar when CH is running the pressure rises to approx 3bar then the heating switches off nothing is released via PRV when the pressure begins to drop the heating starts up again. Are all combis fitted with these isolating valves...