Using the remote or pressing the power switch on the doors will unlock/lock all 4 doors. Works great... in cold weather. When it get's hot outside, say about 85+ degrees, the door locks will randomly stop functioning. Drivers door always works. The three other doors seldom work. The lock wiggles a little, but does not complete a lock/unlock cycle. Again, this only happens when it's hot outside. Manually grabbing the lock and pulling up or pushing down is easy, there does not seem to be any binding or sticky issue with linkage. I've been searching around forums and Google for a while and have found a few discussions with similar issues to mine, but as the OP's of the posts near a possible fix, the thread stops and there is no resolution! So I'm calling out to those who have solved this issue. Please share your knowledge!