Recent content by Raymond999

Changing the charge pumps seems to have fixed the probelm

Please take a look Ecotec 937 storage control PCB, charge pump sensor and see if you can solve the mystery of how to test out these parts. The boiler looks like its running ok with the flame on when you draw water 9Lpm shown on the boiler and it looks about write. So I think the flow sensor is...

Well I'm getting old and the dog was barking and I forgot to shunt in both the supply and retune lines. I'm sure it never happens to the experts. Anyway I love DIY its better than watching East Enders on TV. Any bright ideas if its not the pump, cant be much left to change out?

Hi Tony, All the engineers that I know also use the manuals provided from Boiler manufactures, I don't think its asking too much for the manual to have enough information to diagnose problems. Generally speaking the Valliant manuals are very good. The last time I looked you had to be pretty...

Maybe, but the last time I called out an engineer it ended up taken 2 guys a week not to fix it. I will fix it myself and to look on the bright side I will have a pile of spares for any future problems. Having had a valiant to about 25 years Im sure I will get more failures and use up the parts...

Hi, I have the exact same symptoms, but on some days its all fine. I change the plate heat exchanger first, still the same problem. I had accidently got the main PCB wet, so I changed it, still the same problem. After a call to Vaillant (Who could not tell me much about how the PCB in the...