We have the same problem. It started with the whole system not working, they sent an engineer who fixed a fan which enabled the central heating to work, but now when we open the hot taps the whole thing shuts off with the code d1 or dl showing - I understand this just means delay. It then resests itself after a couple of minutes. An engineer's due to come back next week but it's taking so long - and in this cold weather!! Anyone able to help?
Kathy, February 2010