"Glenn Proctor" wrote in message
...
Folks

Thanks for the advice so far.

To clarify: the shower does not do any heating of the water itself. It
just
mixes the existing hot & cold water supplies. The only controls are a
thermostatic dial and an Off-On-Boost flow control knob. It's an Aqualisa,
I
think the Aquastream, as pictured & described he

http://www.plumbworld.co.uk/191-2416

The water feeds are into the rear of the unit so I'm not sure if I can do
anything about adjusting the water pressure without dismantling the whole
thing.

Glenn.


NO !!!! Whoa up there Glen. The pipes that supply the shower will, or
better have, isolator valves on them, so that the shower can be serviced or
repaired without turning all your water off. Please don't go dismantling
your shower at this stage of the fault finding. We don't know if anything
is actually broken yet. :-))

Trace the pipework back to the pump or the tanks from which they're
supplied. Somewhere along these pipes should be taps, stopcocks or things
called Service Valves. A service valve looks just like a straight plumbing
connector, but it has a small slot cut into the middle of it. The slot
actually takes a screwdriver and is used to turn the water off to the rest
of the system so it can be serviced or repaired. Hence the name Service
Valve.

There should be a tap on each side of the supply system, one for the hot,
and of course, one for the cold. The cold water is now coming into the
house much colder than it has been over the summer months, so the shower is
more likely struggling to keep itself hot with a much colder water supply.
If you turn the cold water supply pressure off a bit, then the shower will
not be taking in as much cold and should then be able to balance the
temperature again. So, you should get a hotter shower again.

Start looking along the pipework and try to find a tap, stopcock or a
service valve on the cold water supply side. When you find it, turn it off
a bit, not to much, until you can feel the shower getting hotter. This
might be best done with two people, especially if the pipes are in an
awkward spot, one to feel the shower temperature, while you slowly turn the
cold supply down until you're shouted at.

Good luck with it.