My hot and cold water has turned brown. I ran a bath and noticed the colour difference so let the water out. After the water had drained i wiped the bath with tissue and it was covered with brown stuff (dirt?)

I have recently had a problem with my boiler (BAXI Combi). The boiler seemed to be stuck on hot water mode even when the water had been heated and the flame was out, leaving me with no heating.

A friend came round to have a look and said that the pin was sticking and not switching to heating. He fixed the problem and went on his way. I dont know if this has anything to do with the discoloured water (not sure how fixing the pin could have that effect) but it has happened since then.

Any help or suggestions would be very much appreciated.

Sounds like the domestic heat exchange could be gone, more info on the boiler model please