DCpete816
New Member
I am having problems with my Grohe 34 122 thermostat mixer and just can't seem to figure out what the problem is. The parts are all brand new. The problem is that the temperature cannot be adjusted or calibrated to the 100 degrees as required in the manual. The manual says that an adjusting nut will control the temperature if you turn it right or left. This doesn't seem to be the case with mine. No matter what direction you turn the adjusting knob, the temperature is over 110 degrees F. Is the thermostat bad, or is there someting else I'm missing.
I had a general contractor do all the plumbing, but this is the first thermostat mixer he has installed. He is baffled as well. It just doesn't seem to work as documented.
We are using both outputs to drive two shower heads (top and bottom). Each output has a volume control. The pressure seems fine since both shower heads have good flow at the same time (but temps greater than 110F). We ran 3/4" pipes to hot and cold with a reducer to 1/2" at the very end. This is an 1/2" mixer.
We also have a tankless water heater that is set to 120 degrees F, so I get an endless supply of hot water. My thermometer only goes to 110, so it may always be at 120. I have removed the flow restrictor on one of the heads. It doesn't seem to make a difference.
All hardware is Grohe. Any suggestions? I have a call into Grohe, but haven't heard back yet.
Thanks, Chris
I had a general contractor do all the plumbing, but this is the first thermostat mixer he has installed. He is baffled as well. It just doesn't seem to work as documented.
We are using both outputs to drive two shower heads (top and bottom). Each output has a volume control. The pressure seems fine since both shower heads have good flow at the same time (but temps greater than 110F). We ran 3/4" pipes to hot and cold with a reducer to 1/2" at the very end. This is an 1/2" mixer.
We also have a tankless water heater that is set to 120 degrees F, so I get an endless supply of hot water. My thermometer only goes to 110, so it may always be at 120. I have removed the flow restrictor on one of the heads. It doesn't seem to make a difference.
All hardware is Grohe. Any suggestions? I have a call into Grohe, but haven't heard back yet.
Thanks, Chris