Most of the time years of paint or caulking the seams around the panels will cause the wood to stick and not allow the panel to expand and contract with the weather.
Repair broken paneled door.
Door panel repair with bondo bumper repair a common issue for any owner of mid 90s and newer cars is dealing with broken interior plastic.
After some 200 years of hard knocks and spotty maintenance in the harsh climate of coastal maine our federal period home s frame and panel doors exhibited a range of problems from gaps and loose joints to outright rot.
If a crack has gunk in it clean out the space with a strip of sandpaper.
Once the broken panels slide use a hot glue gun to attach wooden blocks to both side edges of each of the panels.