Can't unlock 2010 CX-9 doors when cold

[MarcCX-9Owner]

For the past 2 mornings (it has been very cold at night), I have been unable to open my CX-9. When I hit the unlock button on my remote, nothing happens. If I try to use the key in the door, the lock looks like it moves, but the door remains locked. Yesterday, after the car warmed up in the driveway, I was able to open it. Haven't tried again today yet. Any ideas on what needs to be replaced?

Thanks.

 

[tex2670]

What if you use de-icer?

 

[MarcCX-9Owner]

It seems like the problem is internal. I don't think that the doors or the lock are actually frozen. The remote and the key don't seem to unlock the doors.

 

[ceric]

The actuator of the lock.

 

[MarcCX-9Owner]

Thanks. Is there an easy way to determine if that is the problem? Are they easy to replace?

 

[MarcCX-9Owner]

Also, when the problem happens, none of the doors unlock. I was just reading about the body control module. Could that be the problem? Would the cold weather cause the BCM to fail?