Combi Boiler - Bath runs cold

[themightyboosh]

We got a new combi boiler less than 2 years ago.

The heating works fine, and the shower which is over the bath and from the same pipes as the bath is fine too

But recently if I run a bath it runs cold then hot then cold then hot - You end up with a luke warm bathfull at best.

I did notice one of the radiators gurgling like mad when I ran the bath, so I whacked the heating on and bled out a lot of air from it.

The problem still persists any idea what else I can try? And is it likely to be anything to do with the radiators? (need more bleeding?)

Thanks

 

[D_Hailsham]

Make and model of boiler?

 

[themightyboosh]

Its a Worcester (Bosch?), not sure about the model could probably find out a bit later

 

[Red_Man]

Rub the bath and stand by the boiler. See if the water is cycling on and off.

 

[themightyboosh]

Ok, as in firing up and then going off again? It should be constant the whole time its running I assume

 

[Red_Man]

Yes. And this isn't happening with any other hot tap?

 

[themightyboosh]

It doesnt appear to be, and you can take a decent shower with no fluctuation in temperature at all.

I will try testing it all tonight, starting with the tap closest to the boiler.