ᐅ At My Wits' End – Adjusting the Settings on a Shower Mixer Valve

Created on: 4 Mar 2014 14:08
D
Darkmac
Hello everyone,

I’m starting to get really frustrated. A year ago, we moved into a newly built rental home. When we moved in, the heating and hot water were set to the highest level. That’s why our shower mixer was delivering very hot water.
After the heating technician explained our system to us and adjusted it according to our needs, the shower water stopped getting really hot (only about 32°C (90°F)). So, we called our landlord, who sent a plumber over.

Unfortunately, when the plumber was adjusting the temperature, the window installers were also at our place and needed some information. I couldn’t watch over the plumber’s shoulder, so now I don’t know what settings he changed or where.

Now that winter is over and we have lowered the heating a bit, our shower still does not get properly hot. The water in the separate bathtub or the bathroom sink is nice and hot, but the shower is not.

We have a Grohe thermostatic mixer in the shower, see picture.

What do I need to do to get hot water again in the shower?

Thanks for your help:

Picture of the mixer:


Below it is the Grohe Rapido T

Chrome bathroom mixer with rotary knob on bathroom tiles
emer5 Mar 2014 06:00
In the worst case, just try it out. If you turn one all the way and only cold water comes out, you have probably turned off the hot water...
D
Darkmac
7 Mar 2014 16:25
Am I doing something wrong? These things won’t turn, not even with a long Allen key. Do I have to shut off the main water valve if I want to change something there? It can’t be that I have to use a pipe extension and leverage to turn it.
emer7 Mar 2014 16:34
Get a plumber before you cause any damage. It seems like you don’t really know what you’re doing.
emer7 Mar 2014 16:45
Get a plumber before you cause any damage. It seems like you don’t really know what you’re doing.