My pipes make a loud squealing noise and then water starts pouring out of my stand alone shower head in the master bathroom without being turned on. It's a Kohler single handle unit and I had to replace the diverter over the summer. Haven't had any issues until now. I tear it apart and check the O-rings and nothing looks out of the ordinary. I re-assemble everything and it will work fine for several weeks. The water that flows out of the shower head is cold. Scratching my head on this one