Grohe 47 111 thermostat valve/thermoelement cartridge doesn't let cold water through

Discussion in 'Shower & Bathtub Forum & Blog' started by ovidiu, May 20, 2013.

  1. ovidiu

    ovidiu New Member

    May 19, 2013
    I have an Integrated Grohmix 34-436, which served us well for the past 10 years:

    However few weeks ago, the thermostat valve started misbehaving, not letting enough hot water through. So I bought a replacement and installed it.

    To test whether it works or not, I put the lever in the open position and turn on the cold and hot water service stops. Unfortunately only hot water comes out, the cold water is not let through. I tried turning the knob on the thermostat valve to no avail, only the hot water keeps coming out, no matter which position the knob is in.

    When I put back in the old thermostat valve, the water is mixed correctly, just not as hot as it should.

    Is there a calibration procedure that needs to be done on the valve itself? Besides the front knob, there isn't anything else that could be adjusted.

    Is there a correct way to insert the cartridge? There is a longitudinal cut on the cartridge, does it need to be in a certain position when I push it in and before I start to screw it in?

    Any thoughts on what could be the problem? At this point I'm thinking the replacement thermostat valve is bad.
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    I've only needed to call them once, but the tech line at Grohe was both helpful and accurate...I'd go to the source.
  3. Sponsor

    Sponsor Paid Advertisement

Similar Threads: Grohe thermostat
Forum Title Date
Shower & Bathtub Forum & Blog Grohe Thermostatic shower valve issue Dec 23, 2013
Shower & Bathtub Forum & Blog Grohe thermostat removal Oct 30, 2013
Shower & Bathtub Forum & Blog Grohe 34126 thermostatic valve problem Mar 7, 2013
Shower & Bathtub Forum & Blog Leaking Grohe Integrated Thermostat Valve 34 436 Sep 30, 2012
Shower & Bathtub Forum & Blog Hansgrohe Thermostatic Shower Cartridge Apr 3, 2012

Share This Page