Plumbing (central heating & domestic hot water) help

[Norbert666]

We've just got back from holiday to find we have no hot water.

I left the boiler running the central heating, but turned off the hot water while we were away.

The central heating is working fine, but for some reason is not heating the water.

If I use the immersian heater in the tank cupboard, I can heat the water that way though.

It's a gas fired combi boiler, one where the hot water and heating are seperate (forget the proper name).

In the boiler cupboard there are two lights indicating heating and hot water. The heating light is on, but the other isn't.

Could this just be a fault in the boiler controler?

Any help would be much appreciated.

James

 

[Norbert666]

How exactly did you turn off the hot water? Is it a boiler control?
I am wondering if the infamous 3 way vlave has struck again.

We have a control doo-dah in the kitchen right by the boiler. It's the timer thing where you can set the hot water and heating separately.

I turned the timer off for the water, but left the CH on.

I seem to remember that 3-way valves can get stuck sometimes? How do you unstick them?

 

[Norbert666]

Have you tried putting the water on constant instead of timed?

No. But when it was on timed I tried it when it should work and the control box lit up indicating that it was on.

I'll try fiddling with the control box between timed and permanently on.