Gas boiler heats rads, but not water - why?

by **emanday** » Sun May 30, 2010 4:17 pm

I've had this problem for a few months now. The rads work OK, but the hot water starts to come through the taps only for a minute or so, then goes cold again.

I haven't managed to run a bath for months and If it weren't for my electric shower I'd not be pleasant to be around!

Engineers don't seem to be able to solve the problem.

Help?

by **htg engineer** » Sun May 30, 2010 7:40 pm

We need the boiler make and model, as it could be many things

htg

by **emanday** » Sun May 30, 2010 10:02 pm

Sorry, I should have thought of that.

The boiler is a Ravenheat, between 6 and 8 years old. I don't know the model I'm afraid and it's in the loft, so very difficultfor me to get to.

by **freakazomb** » Sat Jun 19, 2010 6:43 pm

Ravenheat - well know for the HW side of heat exchanger to clog up

by **htg engineer** » Sat Jun 19, 2010 8:11 pm

If it's a combi - then it's probably a diverter or sensor fault.

htg

by **eggers** » Mon Jul 05, 2010 9:11 pm

clogged up domestic heat exchanger, manifolds or fault thermistors