Hi. I know this is a common problem, but haven't managed to find a definitive answer so I'd be grateful for any help. We got a new bathroom fitted in September, with a thermostatic shower (picture attached)- the plumber supplied the shower and it has no markings or instructions, so I can't vouch for the make but assume it will have been cheap. At first, the shower was warm enough, although it was never really possible to make it too hot, but since the winter started, it has always been pretty tepid even at the highest possible temperature. We have a new Worcester 38CDi boiler, which provides very hot water at good pressure to the taps (and to the shower, when you touch the hot side of the valve to check).
I have tried recalibrating the thermostatic valve but it makes no difference to the maximum temperature. I also tried reducing the cold water pressure from the mains (albeit that this would also reduce the pressure to the boiler), but it also didn't boost the temperature. I'm wondering whether it's simply a crap shower with a dodgy cartridge and I have been looking at a Grohe Grohtherm 1000, but I don't want to make the outlay to replace the valve unless I'm confident it'll fix the problem. If I do replace the valve, I'd like to avoid replacing the heads, but as you can see on the picture, the current valve appears to have been fitted upside-down, presumably swapping the ends over- the flow valve is on the left as normal, and the temperature control on the right. Would I need to/would it be possible to swap the ends over on the Grohe, since if I fitted it upside-down, presumably it wouldn't work as the thermostat would be on the wrong side?
Thanks in advance for any help, and apologies for the rambling post.
I have tried recalibrating the thermostatic valve but it makes no difference to the maximum temperature. I also tried reducing the cold water pressure from the mains (albeit that this would also reduce the pressure to the boiler), but it also didn't boost the temperature. I'm wondering whether it's simply a crap shower with a dodgy cartridge and I have been looking at a Grohe Grohtherm 1000, but I don't want to make the outlay to replace the valve unless I'm confident it'll fix the problem. If I do replace the valve, I'd like to avoid replacing the heads, but as you can see on the picture, the current valve appears to have been fitted upside-down, presumably swapping the ends over- the flow valve is on the left as normal, and the temperature control on the right. Would I need to/would it be possible to swap the ends over on the Grohe, since if I fitted it upside-down, presumably it wouldn't work as the thermostat would be on the wrong side?
Thanks in advance for any help, and apologies for the rambling post.
