Temperature drop in shower water. Big mystery!

Hello everyone,

since my skills in remote diagnostics come to an end here and Mr. Schmidt is so fixated on the backflow preventers, this seems to be a known problem of the faucet manufacturer.

I am curious about the cause

Best regards ALMI

Hello Katharina,

we have the same problem as you described!
We also have a new bathroom with fittings from Hans Grohe, including a Raindance overhead shower and a handheld shower.
In our case, the temperature also drops from hot to about 35 degrees after approximately 15 seconds.
Have you possibly found a solution or was someone able to help you?
Showering is no longer enjoyable for us either, and our heating technician is letting us down badly.
We look forward to a quick reply from you!

Regards
Tina