Hi Andy
I called the vaillant technical support lots of russeling of manuals going on but they were not much help (especially at 60p a min) after about 10 mins they have suggested booking a service call.
My installer is coming back on Sat as he needs to fit the overflow into a drain so will...
Hi I have recently had a Vaillant Ecotec 837 combi installed but I am not sure if it is working correct - Can someone advise.
Hot water works fine no probs there.
The boiler has a Outdoor sensor for weather compensation installed - My installer had never fitted one before so he is unsure if...