Hi Tony
Thanks for your reply.
The enginneer who put in X400 for me, told me to get PCB for this boilor - saying that this might be the problem.
So now I have the part in hand and what to change it.
Also, from this evening my hot water also keeps cutting off.
Many thanks for...
Hi Guys
I have PCB part no 252905, I don't know how to change it? Is it as simple and straight forward as taking it out and putting another one in in reverse order?
Thanks in advance.
Hi Guys
Thanks for your prompt reply. I had the enginerer in yesterday and he put X400 in, but my system is cutting off within 3-4 mins not giving enough chance for the chemical to run through the system. But if I keep the hot water and the radiators (9) running at the same time then it stays...
I have an old valliant sine 18.
halfbake posted his problem on 4/12/09. I have the same problem but I have the hot water but no heating. As soon as I put the heating on, within 4-5 minutes the whole system keeps failing so then I have no hot water or heating and I have to keep resetting the...
I am new to this site.
I have Vaillant boilor sine 18. The over heat device keeps cutting off. What could be the problem?
Await your reply. Many thanks.