Customer had another technician out that installed a new shower cartridge, now the handle doesn’t tighten down, it leaks, and it doesn’t go all the way to hot. Turned the water off and removed the cartridge, it looked off a bit so reseated it and turned the water on with no leaks. The cartridge has a scald guard so I turned the temperature up on it and the customer gets hot water now.Handle is missing the set screw that the technician drilled out, purchased a new set screw and tightened the handle down. Customer is happy and now everything works as it should.