Bosch Classixx 7 Tumble Dryer Door Light Problem?

Hi all,

I have a problem with the above appliance. Just completed a drying cycle earlier and now the door light has come on and will not go off even when the door is shut. There doesn't seem to be a catch problem. It is opening and closing exactly as before. I have switched it off and on again, I have emptied any excess lint from the filter inside the door but still the light remains on even when the door is closed and I cannot use the dryer. Currently have a stack of wet clothes to dry. Can anyone help? Please.......