the door handle on my double glazed back door although it is still possible to lock the door is floppy possible broken spring ? any body able to throw any light on this problem and iff so how i could check this and possibly repair, with thanks much appreciated
The door handles have their own internal spring, visible when you unscrew the handles from the door. Take the old handle with you when you go looking for a replacement - B&Q and Wickes have a selection.
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Try fixfault.com to fix windows and doors.