Question about Grohe Integrated 1/2'' Shower Thermostatic Rough-In Valve With Stops - 3412
If I turn on hot water in my bathroom sink only gets Luke warm, but if I leave water off in shower and only turn the thermostatic temp control to hot, immediately water in sink gets hot or very hot depending on what temp I set the showers valve at. I'm stumped? I did recently replace my hot water heater. Could there be some sort of issue there or is the problem in my fancy showers mixing valve? This actually has the same affect in other areas of the house. Guest bathroom has same problem. But I have a mixing valve in that shower too. Help!!!!!!!!!!
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Posted on Jan 02, 2017
SOURCE: Grohe Thermostatic Valve
the temp, control valve is getting to hot!!! there for only let so much hot water go thru, did you take the inner parts out when soldering this in, if not you might have damaged it, and if so need to replace the cartdrige
Posted on Jun 06, 2009
SOURCE: I have exactly the same problem
you need to change the cartridge, it is a temp control and is going bad so it keeps you from burning yourself it is like a mixing valve and is givng more cold water, that way you don;t get burned,,
Posted on Jun 21, 2009
SOURCE: grohe shower
if you pull the handle off all the way back to the valve body there is a little black stopper around the cartridge body that you can adjust by pulling it out and sliding around the cartridge body this enables people to just turn the handle to one setting and jumpping in to their favorite temperature. in your case it doesn't allow you to have any cold water. so turn it one way see if you get what you want or try the other or some of them you can even just take the darn thing out and not even have to worry about it
Posted on Jul 29, 2009
Do you mean the other faucets in the house are hot and only the shower is warm? If so there is an anti-scald adjustment on the faucet that needs to be turned up a few notches. Havent adjusted a Grohe faucet but most faucets you rmove the handle and behind the handle is a nothced adjustment ring that prevents the faucet from getting too hot. This ring, or stop, is pulled out and twisted clockwise(or counter clockwise to set higher or lower max temp, then pushed back. maybe you can look up grohe to see which way ring or stop adjusts for hotter water.
Posted on Jan 25, 2010
The thermostatic mixing spool cartridge may be worn out. The low water pressure may indicate sediment in the cartridge as well. This can be easily removed by hand tools
Posted on Feb 19, 2010
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