Check the level of your machine. If the chassis is twisting because the floor is not level, or if the machine is tilting too far forward, the door is more likely to pop open.
Other than that, I'm no help :-)
Douglas
October 2011
I can answer this question...
Whydoes my proline tumbledryer door keep popping open?
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix tumble dryers.