You probably need new gaskets in your faucet.
The shower is turned off but the water is still running because there may be a leak in the faucet or showerhead, causing water to continue flowing even when the shower is not in use.
The valve is not be diverting all the water. This valve may need to be replaced.
Yes, remove your old shower valve and fit a new Moen anti-scald valve. This will not change when other items are turned on.
Your suspicion is correct. Sounds like the fan is running continuously. You must have that problem solved to correct the issue. The fan should stop when the ignition is turned off. Sounds like a stuck relay.
It is not supposed to be on when engine is running unless there is a problem.
Your shower may be making noise when turned on due to air trapped in the pipes, a loose valve or washer, or a problem with the water pressure. It is recommended to have a professional plumber inspect and repair the issue to prevent any further damage.
My probe will not shift to any gear while running but will when turned off. Before taking it to a mechanic I would like a general idea if this is a clutch or transmission problem.
The shower water may not be coming out due to a clogged showerhead, a problem with the water supply, or a malfunction in the shower valve. It is recommended to check for any blockages in the showerhead, ensure the water supply is turned on, and inspect the shower valve for any issues. If the problem persists, it may be necessary to seek professional help to diagnose and fix the issue.
The laminar flow hood should be left operating continuously when in use to maintain the sterile airflow. If it is turned off, it should not be used until it has been running for at least 30 minutes to ensure that the air inside the hood is once again sterile.
The shower valve needs to be repaired! As for the water not shutting off when you turned off the main that is also needing replacement when it shut of by turning on other faucets you were simply diverting the flow from the leaking main shut off.
If your toilet is still running after the water has been turned off, it could be due to a faulty flapper valve or a problem with the fill valve. These parts may need to be replaced to stop the running water.
You need to check your hot/cold handles or the shower spicket. Not sure what type you have, but they come off. More than likely you need to just replace a gasket..