intermittent cold shower Brrrrr

flissh

Hi Peeps,

We have a mixer type shower and mostly it works fine. Except lately it is only lukewarm at best if the heating is on as well as the hot water.

We have a Worcester heat slave oil boiler. It has a small tank with about ?80 litres of water storage (I think) which was just about enough to get a nice hot shower before.

The most annoying thing is having a chilly shower then running the water in the sink and it's really hot.

Any ideas? Don't want to change the shower if it is a boiler problem.

flissh

I've prob answered my own question there! Just turned the heating off and had a shower and it was fine. Does that mean it's my boiler?

Chunks

Almost certainly boiler related - could be a number of reasons....

keystone

Chunks wrote: »

Almost certainly boiler related - could be a number of reasons....

One of which is it is almost certainly not the boiler.

Cheers

keystone

flissh wrote: »

Just turned the heating off and had a shower and it was fine.

Big clue there! How is the heated water from the boiler distributed in youir system between both DHW and CH?

Does that mean it's my boiler?

No it doesn't.

Cheers

flissh

Thanks for the replies.
Keystone I'm not sure how my hot water is distributed. The shower does not have a pump.
I'm not any closer to working it out. I'll have to get someone in.

Canucklehead

O.P. : do you have a themostatic shower mixer and if you do can you turn the thermostat control from fully hot to fully cold i.e. water comes out of the shower head very hot or very cold?

The Worcester Heatslave is an oil combi so DHW takes priority over heating i.e. heating and hot water cannot be 'on' at the same time.

HTH

Canucklehead

flissh

Canucklehead,
It is a thermostatic mixer. And yes, I can turn it to cold and then to hot. Tried that today. I deliberately turned the heating off and had a shower, lovely and hot!

In the morning the water comes on, about 15 minutes later the heating is set to come on. Both 'on' lights are on the boiler. During this time shower will only be tepid, (despite very hot water from the tap) Unless, like today I turn the heating off.

Canucklehead

Hi.

It would seem to be the boiler, although the cool shower- hot tap situation is a bit odd.

Is there a good flow of hot from the shower?

GSR.

flissh

Yes good flow. The feed pipes are easy to get to on the other side of the wall (A big cupboard in Daughters bedroom) and have isolators. I did think about turning the cold feed down a bit? What do you think about that?

w1o2o3l4y5h6e7a8d9

Have you got a motorised valve fitted? It could be sticking. My one has a tab to indicate whether it's on water or rads. My shower's inlet valves became clogged by limescale.
Does anyone know how the temperature is meant to be controlled in a Triton LP 3000? Are the valves involved and if so how? If they control crossflow, as it says in the handbook, how is that related to temperature?
Is is better to get a new, low priced shower with a 3 year gaurantee then mess about repairing an old one that also leaks? It's no more expensive than calling a plumber in. If the only thing to watch for is the fitting type, size and spacing of the inlet water pipes why not measure and record the existing ones before buying an new shower. I'm told a set of O rings for my shower costs £50. This is ridiculously expensive for what can only cost a few pence to make. Any comments?