Hot Water.

[GavinMcComb]

I have a combi boiler: why would I, suddenly, not get hot water through my kitchen sink tap, but still get hot water from both my bathroom sink and bath taps?

[gasman]

As you still have hot water at you're other taps then this would sugest a problem with you're kitchen tap and not a boiler problem. The most likely cause is a faulty/worn tap washer that has diss-lodged in the seating of the tap and it will simply require taking out anda new washer fitting.

[GavinMcComb]

sorry... should have made it more clear. The water runs cold.
The pressure seems the same, but it won't fire the boiler.

[john91]

is it a mixer tap?

[john91]

should have added, if it is, then it might be something blocking the hot water side of the mixer as gasman suggests.

[GavinMcComb]

yes it is a mixer tap. have just discovered that when the heating is on and the boiler is fired up, then I can draw hot water from the tap. As soon as the heating goes off it's back to cold water only. I am beginning to wonder if I should reset the whole sysyem. What does anyone think to that?

[battyjules]

Last summer I had the same sort of problem, hot water from the bathroom taps but none from the kitchen taps, both are mixer taps.... but the taps wasn't the problem, it was a problem with the combi boiler, it was some sort of diaphram, I really can't remember what it was called exactly but the plumber took about 5 minutes to replace the old one and it cost about �40.