Hi All,
I wonder if someone might be able to offer some advice before I have to remortgage my house to call in a plumber.
We have a simple mixer shower upstairs (standalone, not a bath) which has worked fine for months and now won't run hot water. We have a "Worcester 28i Junior" Boiler, and both central heating and all taps run both hot and cold water fine. I haven't touched anything, honest!
The mixer unit is very small, just has 2 'nobs' on, one for flow rate and one for temperature. There are 2 pipes running off it into the wall (a stud wall) straight up into the loft, along the floor about 3 meters then straight down, past the boiler and downstairs. The cold pipe joins the boiler, the hot one doesn't appear to (at least not above floor level). There are no obvious pumps or anything anywhere else in the house, I've even dismantled the bath downstairs.
When I open up any hot water tap, I can hear the boiler start up and a power light comes on. But when I turn on the shower, the water pressure is really low and there's no action from the boiler. Occasionally there is hot water for a minute or two, but the pressure remains low and it soon runs ice cold.
I've pretty much exhausted everything I can think of (not much) so any ideas would be most welcome.
Cheers
Rick