[joglynne]

Originally Posted by foreverwar

Usually, yes - but yesterday, I had to go outside and pour warm water over two sets of pipes; the condensate pipe from our condensing boiler, and the outflow pipe from our en-suite sink - both were blocked by ice (very unusual, I know).

We are having the same problem with the condensing pipe today. Lost track of how many kettles of water we have used and have now resorted to heating wet towels in the microwave as they keep the pipe warmer for longer. Pipe still not unblocked.