I'm having a bit of trouble with the central locking on my frs. Intermittently when you lock it it opens itself back up straight away. I have sprayed wd40 in all the locks and mechanisms but still doing it sometimes anyone else had this problem.

 

My passenger lock was sticky and used to cause similar symptoms so it'd start there

 

drivers side lock for my money

 

Is it usually the central locking motor that causes the problem or the lock barrel itsself