Remove the inner door panel & start checking for linkage & handle problems
what is wrong with the door latch? will it not open/latch? what year is the vehicle? all of these are needed to answer your question.
Pull the INSIDE handle as if you were going to open the door and then use a flat blade screwdriver ( or any screwdriver ) to move the latch sections apart
Did you check the door latch/lock. The latch part might be broken on the inside. If you have the door already open it is easy to chisel out the old door latch inside of the door.
Get a jig saw with a metal cutting blade. Cut a big hole in the outside sheet matal as close as possible to the door latch. Reach through the hole and unhook the latch. Your done!
It should open from the inside. Then the switch is usually in the latch for the door. HTH
If I understand you right the door is opened and won't close because the latch is tripped. Lift up on the door handle and take your finger or a screw driver and move the latch to the open position
pull the door handle on the outside and open the latch by hand both at the same time
ideaswill it open from the outside and not the inside if so then it's a child safety lock located on the door jam near the latch if not you could have any of the following broken lock, door latch or the latch is just stuck.
There is none. Here's how you open the fuel door: Make sure that the driver's door is unlocked. With the driver's door locked, the fuel fill door is also locked. Outside of the vehicle, push on the right side edge of the fuel fill door in the middle.
Spray the latch (in the door) liberally WD40 open and close the door many times and then spray with silicone
Roll down the window, reach outside, and lift the door latch or lever.
How do you open the hood latch from the outside on a subaru impreza