Hi, I’m an Aussie living in Peru, and am finding it difficult to find a plumber/gasfitter (as professionals don’t exist here) to help me with my Junkers tankless hot water system. Everything works fine, the water is very hot, but exactly 5 minutes into a shower, the hot water stops. I then need to shut the tap and start it again, a process which is slightly unpleasant in winter.
Any tips as to the cause and solution would be greatly appreciated by my wife and I.