2000 sable frt latch dont work

door lock may be sticking due to water ingress and maybe sticking due to frost. spray plenty water displacement fluid in /around locking mechanism. you may also need to remove door card and access internals of latch to spray also.

if it won`t close look at the door latch mechanism. there should be two u shaped claws that close around the door striker plate pin, sometimes these get closed before the door is closed causing the door not to close and stay closed. if they are closed(claws) pull the door handle to open the door and take something and push the claws out(open) then close the door.

sometimes when it is this cold after car heats up and gets cold again the door mechanism ie latch can refreeze

Door latch on door itself is in closed position if it will not close at all. In this case, open door and pull outside handle hard to pop open door latch. If you have door opening at random, door latch needs replacing or door catch on body is loose.

Try using the interior door release latch...pull as if to open...this should re set your door stops to the correct position...:)

make sure the door handle on the outside has returned to normal position, sometimes the cold will make them stick. The door opens but the outside handle sticks open and the door won't latch. Hope this helps.

Check the latch mechanism on the door. There is a piece of the latch that closes around the clasp on the door frame. sometimes this closes when the door is open and you can't shut the door. Take a screw driver and flip this latch piece open and close the door.

you have either the thumb wheel switch beside the headlamp switch is turned all the way up or a sticking door ajar switch.
Does the door ajar light in instrument cluster stay on?
If so then you can shoot some WD-40 into the latches on the side of the doors then open and close them firmly a few times and this will usually unstick them.

My 2000 Sable does it evey winter - all 4 doors. I have found spraying WD 40 into the latch on the door works quickly to allow you to close the door.