Well, obviously I meant 'hard' water and not 'hot' water, although the attraction of Icelandic Geothermal energy isn't lost on me as the shower went cold again this morning!
I do have hot and cold water feeds to the washing machine... perhaps a clue to being ingenius???
Thanks for the replys
The water starts off at the 'right' temperature, and stays at the temperature until about 20 seconds before the lockout, when it gets warmer, but not excessively so.
This comment in the manual made me think the Heat Exchanger could be cleaned rather than replaced...
We have recently bought our first house and the Potterton Puma 80e (i know, i've read the posts - i'd replace it if i could afford to) has caused a few problems... I have had it looked at by British Gas Homecare, they fixed the central heating problems by doing something with the pump, and...