The bottom door panels were badly rotted underneath the paint. The rot extended into the architrave.
Rot in bottom of all exterior french doors had gone through to the interior. This is very common and always occurs because the moldings allow water to get in if it has not been kept water tight or sheltered by an awningThe rot had extended into the architrave. This is not so evident in the photo as the paint is covering it up. Once a bit of pressure was applied the paint gave way and exposed the wood rotAfter repairsThe door has been repaired by replacing the wood below the glassThe repaired interior of the door just needs new latches nowFrench door rot repairs on two sets