Kohler k-401 Mixing valve, Cartridge Repair or Replace?
I have a shower with a K-401 Mixing valve. Shower used to be hot enough, but now it runs luke warm though the temperature control is max'd out (i have the mixing valve turned all the way hot without the limit stop installed). Hot inlet water temperature is about 130.
It doesn't look like there is any way to adjust the mixing ratio.
Kohler 401 Mixing Valve Cartridge Repair or Replace?
Can the Kohler Cartridge #78913 be repaired by a DIYer? The valve stem has only 1/4 rotation with the limit stop removed. Therefore the shower produces only hot and hotter flow. The supply of both hot and cold is within specs. The inlet check/stop valves are open.
A new cartridge is about $200 which I would like to avoid with a in-house repair. Any advise?
Kohler K-401 Mixing Valve
So here I am exactly two years later with the same problem. I have a Kohler K-401 mixing valve in my shower. Two years ago, the water started running cool to warm, even though the valve was turned to as hot a temperature as possible. I ended up replacing the Kohler Cartridge #78913.
Two years later, I am having the same problem. I pulled the cartridge, inspected it. It looked like one of the screens moved over the bottom o-ring. I moved the screen back. Replaced the cartridge and now the water is cooler.
Seems odd to have the same problem again. As Kohler has a life-time warranty, I can replace the cartridge, but maybe there is something else causing the problem? Other than the cartridge there isn't much else in the system. Thoughts?
Also the cartridge has a very large diameter with a very fine thread. I live in fear of cross threading. If there are tips (other than patience) I'd appreciate it.