As if this wasn't enough I had this morning the chimney sweep informing me that the heating system in my flat doesn't meet the standards in the fume emission tests, worse, I shouldn't use the thing at all because its too high carbon monoxid emission. Meaning that I am without hot water right now. I can't say I'm surprised. The thing is thirty years old and should be replaced rather sooner than later. Called my landlady who was not pleased by the news. Arranged that the heating engineer comes friday morning before I have to leave for work. For now he will cleanse the unit in the hope that this will be enough. I will wait and see.