Water keeps filling even if dishwater is off or if the door is open, the only way to stop it is from turning tap valve off below the sink.

Check water supply to dishwasher. If ok then check water inlet filter for block. If blocked clean or replace.

A defective switch may interfere with your dishwasher's filling ability. Yourdishwasher may not be filling with water simply because the water valve's filter screens are dirty and debris-filled. Gain access to your water inlet valve and try cleaning it out. This might be enough to solve the problem.

Dishwasher Repair Guide - Dishwasher won't fill with water..

or try this link..
dishwasher won fill with water Google Search

Check that your supply faucet is open, Check if there is a screen in the supply line, these can become blocked due to scale deposits from the mains. If there is no screen check that the inlet solenoid valve has not got blocked. If none of the above help, check that there is power getting to the solenoid valve when the machine is supposed to be on the fill cycle. If no power is betting to the valve, the timer might ba faulty. (You can try hand filling the machine and see if it goes through a cycle, at least up to the rinse stage, this will tell you if the timer control is working).
If you feel that there is water not being pumped out, remove the bottom strainers and make sure that there is nothing obstructing the outlet pipe and the pump. If possible back flush through the outlet pipe and try draining the machine again before using it again.

Close the water supply valve and allow the machine to completely drain the water from the tub. Turn off the machine and disconnect it from the power outlet. Open the water supply valve. Replace the water inlet valve if water drips into the tub when the machine is off.

Start a new cycle if the machine stops filling when it is off. The control board or the water level switch is malfunctioning if it keeps filling even during the spin cycle. Indicate the model number for proper troubleshooting and repair assistance.

sounds like you mean when the unit is running you are getting water dripping from the bottom of the door panel. if you remove the door panel at the bottom where the door hinges you will find an overflow tray which runs the width of the door. This is probably blocked with food deposits.

If not you may be using too much detergent. try running with no detergent and see if there are any leaks.if you open the door mid cycle the water level shouldn't be any higher than the bottom spray arm. hope this helps

sounds like a problem with the pressure chamber. you better have a appliance tech come out to fix it.

Try the valves inside the back where the water hoses connect to the machine they should default to the closed position when water is not required

The drain valve is stuck open. This is electrically operated, but may have some debris inhibiting movement. If you can physically move it (with the power off) this should repair the problem.

yes, a broken valve which is a stuck-open valve...to test, remove power and slowly open main water supply and observe...no water should flow.

you have a leak probably from circ pump. there is a float in the base which when lifted by water, shuts everything down and turns on the drain pump