When door locks ..the drain pump runs. As water enters it is drained instantly. No water in drum,drain passage clear. Unplugged the pressure sensor..still DOES IT Bosch Nexxt 300 WFMC2201UC/13

This is a problem in its little computer. It is not the thing most of us can fix w/o special equipment to test it. You could try replacing the controller/computer but consider the gamble and the cost. But if in warranty call the place you bought it. If not, get an estimate for repair. If over 10 years old replace it.

I think you have a coin or something stuck in the drain pump itself. I have had to remove the pump,and take out the coin, reinstall it and it works perfect.

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Hi Robert.

If the machine fills with water and cycle starts but it does not spin and drain, then possible problems are drain hose, drain filter, pressure switch and less frequently pump.

Before advancing to spin the timer board performs a test on drain part of the cycle, stops the drain and checks the door lock. Drain system, pressure switch and lid switch are all parts that if defective may cause no spin.

The first part to be tested is the drain system. This must be checked regardless of the fact that the pump is working. If there is blockage, residual water in the drain system or water flowing back from drain hose may cause the washer not detecting that drain is complete, and not advancing to spin.

Disconnect power and check the drain system, accessing drain filter and hose connected to the drain pump.
In most front loaders this is accessed removing the trim at the base of the front side of the appliance (under the door), and rotating the filter cap counterclockwise. The filter should be located behind the trim at the base of the washer.
Top loader usually offer access to pump either from back or from the bottom of the appliance. In some case (eg.Kenmore top load) you have to lean the machine forware to gain access to the bottom part of the unit, where the pump is located.

After opening the pump hose cover be prepared to collect a good amount of water. Keep a container at hand. Ensure that power is not connected before starting.

Also double check drain hose at the back of the appliance, and check that the elbow height is as prescribed in manual. Incorrect drain hose settings may result in syphoning, that means water is flowing back from drain hose into the washer tube. This may result in no spin.

After performing the check on the drain system test washer again. Sometimes removing eventual blockage in drain pump may fix this kind of problem.

If the pump is draining, but drain doesn't complete, and if there is no blockage in drain lines, a parts that may be causing the no-spin problem are pressure switch and door latch switch.

The door latch switch is checked by electronic control before advancing to spin. The door switch is tested running a cycle with the door switch contacts jumped. If the model has a lock motor more testing is needed. In that case the switch is tested ensuring that the lock motor impedance reads according to specifications and energizing the lock motor.

If the drain stops always at same point and cycle does not advance replace also the pressure switch. The pressure switch detects water level and determines when drain is over and when to advance to spin. This part is difficult to test in full, the part is not expensive and it is usually replaced without testing. Pressure switch is a common failure causing no spin. If drain is OK, then either pressure switch or lid switch/lock system is usually responsible.

If the above is OK , with top loaders you need to add to the list the problems related to motor and transmission. In front loaders, check problems related to motor and motor control unit. Such problems will be near to the end of the troubleshooting list. Check them before deciding to replace the electronic control.

Always disconnect power cord or trip the circuit breaker before performing maintainance operations.

If you need to contact a qualified technician, call the phone number listed on the owners manual.

To find parts give me the model number or click on the link below, select distributor and enter your model number.

Parts and diagrams

Regards.

Ginko

Hi,
This error code means"No water detected entering machine or Pressure switch trip not detected".

Is the machine getting any water? Check that the water supply is turned on.
Press pause cancel twice to clear the display.
Try to run another cycle.
Let me know if I can help with anything else.

The water inside the tub will drain out when the pump filter is removed from the pump housing and flood the base of the washer. If not, the tub drain hose is clogged preventing the water to drain into the pump housing then out.

The door is locked because the foam switch in the pressure switch is open due to the presence of water after the unsuccessful drain cycle.

Disconnect the washer from the power outlet. Remove the three screws holding the lower front access panel to the cabinet and pull the panel down to access the pump housing.

Squeeze the clamp that hold the tub drain hose to the pump housing and slide it back. Prepare a pan to catch the water to prevent flooding. The tub drain hose maybe difficult to remove and you may need to insert something under it to break the seal and pull it off.

Remove the tub drain hose from the tub by squeezing the securing clamp and pulling it off the tub drain outlet. Clear the hose and the tub drain outlet from any debris.

Reinstall the tub drain hose and manually unlock the door before reinstalling the access panel. Reach and pull the release ring behind and up the right side of the front panel, then open the door.

have you checked for any foreign objects in the drain pump itself this if the most likely problem.or the drain pump has completly stop.make sure you pull the drain hoses from the pump and check for foreign objects if there is still water in the unit use a shop vac and connect it to the drain hose to remove all the water before disconnecting the drain hoses. after the water is drain this may unlock the door as well

Check and ensure that the tubes and passages to the water level pressure sensor are not blocked by caked detergent, lint , etc.
( this may have caused the water overflow in the first place)
clean up the internal parts that are wetted by the overflow.

clean the door lock mechanism. ( this normally works on a temperature delay mechanism, if cleaning does not work, replace)

all the above done with the power unplugged and water inlets unplugged , of course