Your model number can usually be found on a data plate on the back, side or underneath of the appliance.
Your model number will be a combination of letters and numbers, sometimes separated by a dash (-) or a slash (/).
If the door is not staying shut properly it will be most likely due to a faulty or damaged door catch/latch.
With the help of ForMySpares and this genuine replacement door catch you will be back to being able to properly use your tumble dryer in no time.