I have just posted this but it appears to have missed off the front part so here goes again
I have a 2011 vaillant ecotecplus415 and normally shut it down for summer. I have just tried to re start it and it came on fine and after about 10 minutes boiler temp gauge got to where I had put it, in...
the boiler switches itself off and displays the flashing radiator sign. If I change the d2 setting to 2 mins then after the 2 mins boiler comes on but very quickly shoots up to the 70° (and then to 72°) and shuts it self down again, so the boiler is on at most for around 10seconds. If I change...