The dishwasher water will not shut off then floods. Water flows whether the machine is on or off.

If you can see water flowing down the overflow channel to the pan at the bottom of your Bosch dishwasher while it is running, this indicates that there may be a problem with the dishwasher's float switch or water inlet valve.
The float switch is a small device located at the bottom of the dishwasher's tub that is designed to detect the water level inside the dishwasher. If the water level rises too high, the float switch will shut off the water inlet valve to prevent the dishwasher from overflowing. If the float switch is not functioning properly, it may allow water to continue to flow into the dishwasher, resulting in water flowing down the overflow channel to the pan at the bottom.
Another possible cause of this issue could be a faulty water inlet valve. The water inlet valve is responsible for regulating the flow of water into the dishwasher. If the valve is stuck open or is not functioning properly, it may allow water to continue to flow into the dishwasher, resulting in water flowing down the overflow channel to the pan at the bottom.
To resolve this issue, you may need to have a professional technician inspect and repair your Bosch dishwasher. They can test the float switch and water inlet valve to determine the cause of the problem and replace any faulty components as needed.

If the machine is pumping when on but door is open this indicates that water has gotten into the base (under the tank) and activated the flood safety device. You need to get the machine out, pull on to a towel and tip forward ('lift back feet off the floor approx 45 degrees and let the water flow out. This we deactivate the safety and the machine should now work ok.

Check whether water is flowing the flexible hose. Check the strainer attached to the hose at the machine end.

However try pouring water straight into the wash chamber and start the machine. If it works, it is the incoming water problem

first thing to replace is the fill valve.check to see if there is power supplied to the valve when the unit is off.if there is then replace control board

relay switch is sticking in the open position... the float mechanism tells the unit when to stop pumping water out...

you have a bad fill valve. unplug the unit from the wall or turn breaker off and tell me if the water still comes in if the answer is yes you have a bad fill valve.

Check the water hose going from the sink to the dishwasher to make sure it is'nt clogged, if there's a water shut off valve under the sink make sure it's fully open, also check to make sure the spray arms at the bottom of the dishwasher that supply water to the top rack is clean with no debris or obstructions in the spray hole's, the water entering the dishwasher should be at a warm temp, if it's cold the dishes will not get clean, you should have good water pressure from the house supply for it to fill properly, the float is also called a flood switch, it should not be activated during the water fill cycle, if it's activated it will shut off the water inlet valve and the wash cycle will stop or the dishwasher will drain, if your still having wash problems it could be a defective water inlet valve or a bad timer, if that's the case you might have to call an appliance repair man, hope this helps, good luck.

When you say that you tried other solutions.. it's hard to know which you've tried and which you haven't so I will suggest some basics first.. ( if you've tried them, then disregard)...
Have you checked or addressed the following:

1. Cleaned the drain filter
2. Checked the drain hose for crimps or restrictions
3. Sure the drain system ( such as your feed thru the garbage disposal isn't clogged or restricting flow)
4. Checked your water pump for an obstruction or you can determinbe if it is actually pumping
5. The feed and returm hose ..to anf from the pump are not clogged, pinched or restricting flow.

These are the basics that you should have examined or confirmed aren't causing the problems you are seeing. One other as well.. are you sure your water inlet valve is completely shutting water from leaking in and over-filling the system? Check these items and you should be able to diagnose where the problem is.. Hope this helps you,

drain pump is running all time because there is water in bottom tray. tilt machine back to 45deg and water will flow out. otherwise, take front panel off and mop water out. alll that is required to reset flood switch is to get rid of the water

check to see if you have anything plugged