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Just tried it after upping the pressure and it is still going from warm to hot every 10 seconds or so when running hot water, either from a tap or via the shower. Time to call a plumber in? Thanks, Andy

Thanks for the replys, going to try to take it up to 1.5 bar and give it a go. How can you tell which model number the Valliant is? All I can find on the boiler is Valliant written across the front. (only recently moved in) Thanks, Andy

Hi, I have a valliant boiler, pretty sure it is the Turbo Max, and I have a problem I am hoping someone can help me with. I bled some radiators the other day as there was a lot of air in the system, and after this the boiler would not work. I topped up the water as the pressure had dropped...