Shower - no hot water

muffinek · 14 June 2021 at 9:12PM

Hello

I have combi boiler Worcester Bosch 24i and Bristan qd shxdivff c quadrato shower, which was installed in 2018.

As of this evening the boiler is not switching on when I turn on the shower.

There are no issues with hot water on any other taps in the house whether basin in the same bathroom or kitchen sink.

I also don't get any hot water from the shower even when I run at the same time hot water from the basin and shower.

grumbler · 14 June 2021 at 9:52PM

IMO, only the thermostatic valve can be at fault in this case.

Jeepers_Creepers · 14 June 2021 at 11:43PM

Unless you've done summat silly like turn off an isolating valve, I have to agree with Grumb.

Assuming the flow coming out the rose is pretty good - ie it's not blocked to any significant degree - then a faulty thermostat is the most likely cause.

Are you in a hard water area? Are you able to do some DIY dismantling? It's usually fairly straight forward to remove it, and you could try soaking it in limescale remover.

muffinek · 15 June 2021 at 6:51AM

I will give it a go with a help of some youtube videos. Do I just soak the whole valve or do I need to take this apart too?

Also just to double check, there is no chance it is boiler issue? I am just not sure why boiler wouldn't be turning on?

grumbler · 15 June 2021 at 7:05AM

muffinek said:

I am just not sure why boiler wouldn't be turning on?

Because there's no flow in the hot water pipe.

muffinek · 15 June 2021 at 7:08AM

I will try limescale remover then. I forgot to mention that for the last few days before the shower broke the hot water would get temporally very hot, I guess it is another symptom of issue with valve?

grumbler · 15 June 2021 at 7:23AM

muffinek said:

I forgot to mention that for the last few days before the shower broke the hot water would get temporally very hot, I guess it is another symptom of issue with valve?

If you mean water in the shower, then yes, very likely. The valve works by mixing hot and cold water to maintain the temperature.

Jeepers_Creepers · 15 June 2021 at 12:04PM

You only need to remove and soak the whole cartridge, not dismantle it.

muffinek · 15 June 2021 at 12:45PM

Jeepers_Creepers said:

You only need to remove and soak the whole cartridge, not dismantle it.

Thanks a lot, I was planning to take the whole valve off, which would require to dismantle the whole shower due to the setup. I guess if that doesn't help then I would need to buy new cartridge?