Yes we know what it is, you have spent a lot of money wasted? Surely better to ring a pro, the part costs about £20, probably would have been fixed by a pro all in for less than the bits you fitted mate, as 831 said search ex vaillant engineer in your area he will sort it
Thanks kid, agile should retire gracefully , its difficult to diagnose, or guess , but it sounds like its around pump pd valve area. Dont know any in ur area so as much as it pains me, pay the £299 vaillant fixed price repair
Ahhhh please listen buddy were going round in circles,,,, UNLESS YOU HAVE VAILLANT CONTROLS THE HW STAT DOES NOTHING!!! Your whole system is controlled through the ch stat... whether its hot water or heating... just turn it up an let ur external controls do their stuff
I think they mean the comfort(warmstart) steel, they sound a bit confused. If they switch the ch off on the stsytem boiler with standard controls, nothing will work. The hw setting does nothing
As its a system boiler only one part of the pcb works. Press button under hw symbol use + bring up to 65c press ok. Then do the same under the heating radiator symbol. It will be controlled via your clocks and stats. Leave everything else alone. Your engineer probably got confused as the 637...
I really don't know how tony makes this stuff up. I agree with 112, I got caught recently where 22mm went from meter to boxing ,then appeared upstairs as 22mm. I fitted a Combi Andy pressure was crap, turned out some dick had connected the copper into lead where it was hidden. I upgraded at my...