How can i open the door on my washing machine it wont open

hi Margaret.
If the washing machine malfunctions or you need to stop the cycle and retrieve the clothing, you can force the door to unlock.

• Open the door after the "Door Lock" indicator turns off. ...
• Press the "On/Off" button, if the washer is not already on.
• Select the "Spin Speed" button to turn on the Drain & Speed cycle.
• or go to this link and have a read up.

LG front loader washing machine wont unlock Google Search

Not sure if you mean when it is fully off or operating, but if you mean that once it is operating the door won't open, then the following applies...

Once a front loader wash cycle starts, the door on a front loader is physically (electronically) locked until the full cycle ends after spin dry. This is to prevent anyone opening the door and letting all the water out in the middle of the wash cycle, which a lot of people try to do to put in more clothing etc.

You will need to remove the drum and reset the alignment.
The cloth is struck and has jammed on the drum movement.
click this link: drum removal

Please check on the link below for tips:

http://www.espares.co.uk/advice/washing-machines/a/7/1294/how-to-open-a-washing-machine-door-thats-stuc.html

Need to check the drain pump area located on bottom of unit,, either something is in drain pump or hose that connects to drain pump. if all that looks ok then you most likely have a faulty drain pump assembly....

this may sound silly but just had the same problem changed the pump and it works fine now, if the pump does not work it wont let the washer start

Turn the power off and leave for 5-10 minutes then turn on. This should release the door lock the problem could be the pump drain filter is blocked clean this and it should resolve future problems.

Is this a newly installed machine?

That smell would normally be associated with drains, indicating that the outlet from the machine to the drain is not correctly fitted with a trap.

try selecting wash programme before switching power on to machine, as often with indeset if you move timer while on this will happen

Depending on the model you may have a reset point on the selector switch dial.
This is usually indicated by 2 or 3 black dots on the dial.
If it has , then switch the m/c off, set the dial to one of these points, switch on and wait until light fashes, switch off, and reselect your programme.
It should now work normally.
If it does not, then there is probably a control board fault.
If there is no reset point, then again it is likely to be a control board fault.
Please rate my solution.
Thankyou.