Machine is locked

From user manual:

10.4 At the end of the drying programme

1. The appliance stops automatically.
2. The acoustic signals operate (if they are active).
3. In the display (number "0") comes on.
4. The indicator of button Start/Pause goes off.
5. The last minutes of the drying cycle the appliance performs the
anticrease phase. The anti-crease symbol flashes. The
door is still locked (the key symbol is on).
6. Press button On/Off for some seconds to deactivate the
appliance. After some minutes from the end of the programme,
the energy saving function automatically deactivates the
appliance.
7. When the door locked light goes off you can open the door.
8. Remove the laundry from the appliance. Make sure that the drum
is empty.
9. Keep the door ajar, to prevent mildew and odours.
10. Close the water tap.

If this doesn't help than check:
- If the delay start is set, cancel the setting or wait for the end of
countdown.
- Deactivate the Child Lock function if it is on


If anything of this doesn't help then pay attention to all the symbols appears on the display and check what it means in the user manual.

Dado

Have switched this on?

Child-proof lock
? You can protect the appliance from being tampered by activating the child-proof lock.
? When activated, no change can be made to the programme running.
To activate the child-proof lock:
1 Press the 1st and 2nd additional function buttons for 3 seconds.
2 The "C ON" (child lock is activated) symbol appears on the screen.
Note: the child lock symbol will also be displayed whenever any button is pressed while the
machine is child-locked.
3 The child-proof lock lamp on the programme follow-up indicator will light up when the childproof lock is activated.
To deactivate the child-proof lock:
1 Press the 1st and 2nd additional function buttons for 3 seconds.
2 The "C OFF" (child-proof lock is deactivated) symbol appears on the screen.
3 The child-proof lock lamp on the programme follow-up indicator will go off when the child-proof
lock is deactivated.

Could be anything!
If you suspect that there is a fault then it will be displayed by blinking LED "END OF CYCLE". As the display of failure in hexadecimal code it can flash up to max. 15 times than short pause and after that repeat fault code. You must to count the number of times the LED "END OF CYCLE" flash up.

Example from user manual: Anti-flood device is activated.
- continuous flashing of the indicator light of the running programme
- 3 intermittent audible signals
- 3 flashes of the END OF CYCLE indicator light
(which means "i30" fault code, the cycle is interrupted and the
drain pump switches on).
Possible causes:
Water leakage from the tub - sump and various connections
(pump, upper spray arm duct etc.); floating sensor blocked
mechanically; microswitch faulty; fill solenoid blocked
mechanically; circuit board faulty (solenoid triac short-circuited);
wiring faulty.
Could be also:
To cancel a washing programme in progress:
- Open the dishwasher's door.
- Press the programme selection/cancel button for about 3 seconds,
until the indicator light of the running programme turns off and the
END OF CYCLE indicator light flashes, indicating that the running
programme has been cancelled and that the machine has
returned to setting mode. It is now possible to select another
washing programme. If a new washing programme will be
selected, check that there is detergent in the detergent dispenser.

NOTE: only during the drying phase, if the dishwasher's door will be opened and remains open for more then 30 seconds, the running programme will be automatically cancelled and the machine will return to setting mode. This will happen, always only during the drying phase, also when the machine is switched off by pressing the
On/Off button and remains switched off for more then 30 seconds.

Dado

F06 - Door lock fault
Issue: Washing machine door cannot be opened or closed/when the door is closed the machine the programme will not start.
Advice: If your washing machine door will not close, please check for any obstructions in the door lock.
OR,
Switch off the device. Disconnect power. Wait about 3 minutes.
Open the door, then close. Reconnect device to the network.
Start device.

Cause: Door lock fails to close / open door lock triac open / closed,
frequency signal fault

Dado

Your problem is either one of the 2 cases below.

1. Door Locked Indicator...'Keyhole' symbol
The 'Keyhole' symbol will illuminate 2 seconds after you have
pressed the 'START/CANCEL' button and will remain lit
throughout the wash programme.
The 'Keyhole' symbol will be flashing at the end of the
programme to indicate that the door is still locked. When the
symbol goes off you will hear a bleep and the door can then
be opened.

2. If the machine has been child locked, deactivate this feature by pressing and holding in the 'child lock' button for 2 seconds.You will hear a beep and the child lock symbol will go out,allowing you to use the machine normally.

Hi, I have an indesit IWDE12, I programme the washer which then starts to spin with no water, after 2-3 mins the rinse light, the clock light and the door lock light start to flash and tha washing stops. Does anyone know what this problem could be?

Had this same problem myself. To get mine to start i have to push the door to until it starts.

Following next link:
How washing machine door lock works how to test interlocks
Replace door lock.

When the washing programme is started by pressing the START/PAUSE button, the bi-metal PTC (contacts 3-5) is powered by the triac on the PCB (J6-2 connector): after 2 - 4 seconds, this closes the switch (5-4) which powers the electrical components of the appliance (only if the door is closed).
The door interlock prevents aperture of the door while the appliance is in operation.
At the end of the washing programme, the PCB disconnects the interlock from the power supply, but the door remains locked for 1 to 2 minutes (PTC cooling time).
Certain models feature a pilot lamp which lights to indicate that the door is locked. This pilot lamp switches off when the door can be opened.

Dado

to open your door make sure all the water is out of your drum if not get the outlet hose and place on the floor into a bucket if water comes out than your pump is either blocked/faulty