I have a contractor here to redo my guest bath, which is in-between my main water line/hot water heater (tank) and my master bath. The master bath is on the farthest side of the house away from the main water line, while the guest bath is more towards the middle of the house.
The contractor just finished installing the new tub and the plumbing that connects to the tub. He just began putting up drywall today in preparation to do tile work tomorrow. My master bath seems to be the only problem in my house, but I can't test the under construction guest bathroom because nothing is hooked up right now.
The problem is that the master bath sink never gets hot water, and the master shower only gets hot water if the master bath sink's hot water spigot is turned on. When I have both turned on, the hot water spigot of the sink stays cold. As soon as I turn the hot water spigot off in the sink, the shower turns back to cold. I can almost control the hot water in the shower with the hot water spigot in the sink.
I tried running all of my spigots inside and out, then turning them off again just to try something but it didn't help. I even did it a second time. Any suggestions on what to do? I asked the contractor working on the bathroom if I should call a plumber, but he says he wants to come check it out tomorrow morning. Is there a chance that once the rest of the water can run to the guest bath again that things will get back to normal? Thank you for any assistance.
Best Answer
The issue was the mixing valve like was suggested in the comments. The contractor luckily listened to me and replaced it before starting the tile work. He said that he, "didn't think that was needed," and also said, "I am not a plumber". Thank you for all your help in the comments.