Hi, Thanks for all your responses..
Now I get the same problem on the CH aswell as the HW. keeps re-starting the flame after 5 seconds.
Yes the water in the system was pretty dirty, I have installed a mag-netech device and put some solution in the system to de-scale /sludge it.
When...
I have just had a problem with my HW heat exchanger, when the temp got to 43 Degrees it cut out and reset the flame. I replaced the HE and that solved the problem.
Now I have new problems with my hot water. When the boiler is cold I get hot water no problem, but if I try the hot water tap...