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I suspect that its actually the door switch not making correctly, so it thinks the door has been opened.
Disconect the power
Remove the screws around the door and the front door panel will come away
You will see the microswitch in the handle.
Watch the operation as you close the door.
Please go here
(Just click n the word in blue)
This is the switch and handle. A you can see it is available !
However, I think you can "adjust" it so that it works correctly, rather than spending nearly £60!
If you need more help, please just ask
In the meantime,
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