The combi boiler is still working fine, and hot water is coming from my taps, but the shower has all of a sudden (is c.3 years old) got stuck on a tepid temperature. If i turn the temp control left, it will get colder, but if i turn it past the middle it has no effect. I think that the temp control dial is either stuck or slipping, how can I access and free it?

I can get the shower back up to temperature by running a cold tap in the sink to reduce the cold water pressure

james, February 2008

the thermostatic cartridge is faulty.
turn it fully clockwise and anti-clockwise a few times if it doesn't free it needs a new one.
it's because people leave them in the same setting and they seize up.

hi-spec plumbing & heating, February 2008