Cold bath

[Christian10]

Hi,

Our boiler seems to be running correctly. There are no heating/hot water problems other than in the bath.

When the bath is run the water never heats up so the bath is luke warm at best. I have tried running the tap on a lower pressure but this has not helped.

Is there anything we can do?
Thanks.

 

[penfold46]

Give us a bit more infor for a start....

Boiler Make Model?
Type of heating system?

 

[Christian10]

Boiler is a glow worm combi boiler 100P and we have central heating.

Is this enough info?

 

[penfold46]

When running the bath, do any radiators heat up or does the flow pipe off the boiler heat up?

 

[Christian10]

I have just run the bath for a few minutes and none of the radiators heat up.

I have tried to feel the pipes leaving the boiler and they all seem cold. Not sure if they are the right ones though.

 

[adlplumbing]

try this
turn on heating and see if it fires up at gas meter by seeing if dials turn
if does not then you may well need an rgi to do diagnostic and repair

 

[Christian10]

Just tried it and the heating fires up and the dials turn.

 

[adlplumbing]

right then so that rules out combustion chamber
is your boiler have cylinder or is it instant hot water

 

[tamz]

Try this.
Run the water slower through the bath.
If the water is hot at the other taps it is a flow rate thing. A 3/4" bath tap will pass over twice the volume of water as a 1/2" basin tap.
The boiler has never been set up for the correct flow rate. It should have been restricted there.

 

[Christian10]

It takes a 30 secs or so to heat up so must have cylinder but not exactly sure.

We have also tried running the bath slower but this doesn't seem to help either.

 

[mysteryman]

You have stated that it is a combi. Assuming that there is not a hot water cylinder as well, you need to reduce the flow rate at the hot water tap on the bath until you get the required temperature.

With a combi, you are trading off flowrate against temperature.

 

[Christian10]

sorry, so basically run the tap slower to increase the temp?

 

[mysteryman]

Yes.