Hi there

We had a new shower installed in our guest bedroom 1 year ago and when initially installed the shower worked perfectly - it was hot. Then one day it got cooler and we could no longer get the thermostatic valve to adjust to warm or hot, it stayed cold.

The tap in the sink next to the shower was as hot as it should be. After our 3rd attempt with a new thermostatic shower valve and retiling only 2 weeks ago or so the shower stopped letting out any hot water - despite the fact that the sink next to it gives hot hot water.

Our plumber has flushed the pipes in the bathroom, the boiler is a compatible boiler with the thermostatic shower valve... and there is hot water getting to all the other hot taps and bath in the house. What else could it be? Could there be rust or crud in the pipework running from the sink to the shower?

Advice please - desperate to solve this ongoing problem.

Thanks

Suzie

Hi Suzie...

A few questions here..

Have you guys changed out the entire valve and if so how many times? Or have you changed the CARTRIDGE ASSEMBLY out and if so... how many times?

Do you have a recirculating hot water system that circulates water so hot water is readily available at point of use when you need it?

Let me know answers...

Thanks...

MARK

Hi Mark

Thanks for getting back so fast!

We changed the cartridge only twice and just 2 weeks ago we changed the entire valve (exposing back to the guts of the pipework).

We have a combination boiler which recirculates the hot water and central heating so its always available. When you turn on the hot water tap - the boiler fires up. It also fires up when you turn on the shower, but no hot water is getting through...

Thanks.

Suzie

Suzie...

No recirculating hot water line?

I guess I would start by removing the cartridge and then turning the hot water on to see if you can confirm that hot water gets to valve. Here, you shut hot and cold water shutoffs to valve OFF and then surround the valve with towels so won't leak behind the wall... then turn on hot water only if possible and see what happens... monitor at valve and have someone at shutoff on cellphone so can shut quickly when needed. Let water run for a minute or so and feel water get very hot... then shut down.

If can't isolate the hot and cold water shutoffs then still do this but have to plan on putting hand into valve a bit more so you can confirm hot water is getting into valve or simply put hand on pipes going to the valve if you can (safer).

Test this and then get back to us...ok??

MARK

Thanks again - will get back to you when I get someone round!