I had a new tub installed and new Kohler shower valve by a licensed plumber. I tiled the tub surround, floor, etc.. myself. Now when I go to take a shower, I only have about 5 seconds of hot water, even turned up the full way. I totally removed the red safety check from the valve, made sure the hot/cold shut offs on the valve are fully open, and its still not working correctly. I have hot water in the rest of my house with no problem and the previous valve in the shower worked great. I just replaced the valve now since I had the wall open (best practice). I obviously plan to call the plumber back, but is there something I can do that might be missing? I know he didn't bleed the system after the install, but are new valves self bleeding? If he didn't bleed it would it affect just the shower or the entire water system?
Any direction would be great! I have not looked at the cartridge yet in the valve, but since its new I assumed it should be ok.