Kohler purist keypad willnot turn off

http://www.us.kohler.com/webassets/kpna/catalog/pdf/en/1198327_2.pdf

Call 1-800-4KOHLER 1-800-456-4537)

some parts are under warranty,call them b4 you do anything,they will help figure it out,the link is your manual

Water coming out of the air controls is usually caused by the water jets being turned off or blocked making the water go backwards in the spa system.
Open the jet faces and make sure they are all open and not blocked.

Here is the breakdown for that faucet:

Kohler K-14402

Go to page 6 to see how to remove the aerator. You may need a special tool. This can be ordered from Kohler at 1-800-456-4537.

Hope this helps!

just turn the water valve down some

This is sounding like a relay not working on the circuit board inside the control box. You will want to have a Kohler service center send someone out to have it checked. You most likely need a new control box.

This info should get it working for you. link below

http://www.us.kohler.com/onlinecatalog/pdf/1035530_5.pdf

There are some helpful installation tips available at: https://sofasavant.com/toilet/hatbox-toilet-by-kohler/

Hi it may well do clogged up in drain hole or it may have come loose inside try tighenting up

you may have a defective shower stem, need to go back to store to have it replaced.