Central Locking 1987 244
 

The key action alone will not lock or unlock doors. I have to finish it myself by hand by pushing down or pulling up on the rod. I had the panel off and inspected the piston and all the mechanisms. The piston is just not traveling quite far enough on it's own to lock or unlock. This just happened after our first rain last week. Any suggestions on action to take? I sprayed some WD 40 in there but no help. Thanks