Fills with water but won't wash.

it needs service, so call for it.
lots can be wrong even partially clogged drain paths.
the washers have float valve to detect how much water is in the pan to drain, so clean or replace this valve.
RTM , PAge 57
clean,. these parts

https://www.manualslib.com/manual/528082/Miele-G-1470.html?page=57&term=valve&selected=1#manual

Pre-wash may be compromised and a new power circuit board may be needed.
My advice: As long as the other cycles are accurate and work as usual; Pre-wash in your sink (spray off waste material) before you place the dishes in the washer and commence cleaning. Its best to wash off food and other material before washing in the machine to avoid clogging the drains and pump.

Hi Robin.
If the float gets stuck in the raised position, the dishwasher won't fill with water (Photo 3). Another likely cause is a clogged inlet screen or faulty inlet valve. ... If it doesn't, first make sure the float valve is operating freely (Photo 3). If this doesn't solve the problem, check the inlet valve and screen.

Dishwasher Repair Tips: Dishwasher Not Cleaning Dishes ' The ...

also try this link.

https://www.google.com/search?q=Dishwasher+fills+but+then+it+won%27t+wash.&rlz=1C1AVFC_enGB797GB798&oq=Dishwasher+fills+but+then+it+won%27t+wash.&aqs=chrome..69i57.3233j0j9&sourceid=chrome&ie=UTF-8

The impeller on the wash pump is worn out or the disposer screen is obstructed. Disassemble as needed to investigate the cause.

Hi, Your dishwasher may pre-heat the water. If so, and if the water entering the dishwasher is cool, the heater may take up to half an hour to heat the water. To avoid the wait, increase the incoming water temperature before turning on the dishwasher. Do that by running the kitchen sink faucet until the water runs hot. Or increase the temperature of the hot water to the entire house at the hot water heater.
Timers don't often fail. But if every other part of the dishwasher seems to be working properly and the timer knob seems to be stuck in one place--doing one function continuously--the timer may be at fault. Dishwasher timers can't be repaired. If yours is defective, replace it.

sounds like wash motor is not going . it will fill and control thinks motor is working . then it will drain wash water / ( drain pump is a different motor ) and then refill and so on .. never washes but fills and drains and heats. ( look for leakage under the motor i'm sure you will find some ..

1.) Confirm that the holes of the spray arms are not blocked with debris.
2.) Run a short cycle with an empty dishwasher and no dishwasher soap. Run the dishwasher until you hear it finish filling with water and begins the wash cycle. Add up to two cups of white vinegar to the water and allow to wash and drain. Feel free to do the same when the dishwasher fills again.
3.) Only use a brand name powder detergent (e.g. Electrosol or Cascade) in any dishwasher. Do not use a gel or tablet in any dishwasher. Do not fill the dispenser fully.
Test your dishwasher with a standard load of dirty dishes.
If problems continue, confirm that the heating element is working properly. The heating element is vital to getting clean dishes with modern dishwashers and DW detergent.
Please report back what you find.

first I would check screen on the water fill valve. make sure it is not plugged.
also check the fill hose make sure the hose is not pinched
check that the water is turned on all the...
this dishwasher is time filled the float is to stop the dishwasher at a overfill problem...

Trouble shooting GE dishwasher
Model GSD6600G00WW

Air gap is clean
Garbage disposal is clean
Dishwasher fills with water OK
Drain pump runs after a wait of several minutes and seems to run slow but drains most of the water out of the reservoir.
Dishwasher is not running the wash cycle (spraying water on dishes)

Motor has gone out..just like mine...Make sure u have voltage going to the motor, (disconnect the plug from the motor) and use an electric meter to make sure you have voltage going to the motor. If so the motor has either gone out or has been blocked by something! If no noise except clicking then motor has gone out. Looking at about $150 for motor.