Thank you for your question.
Having the handle loose on you range door can be a concern with it falling off.
I am sorry, but in order to tighten the handle on this model you will have to take the door apart.
Because of the how the door is built the screws for the handle are located on the inside of the door.
There are a number of screws on the bottom edge of the door and two black screws at the top of the door to release the outer panel and inner door liner.
The inner parts of the door, has a lot of parts and many layers and panels with insulation.
I would recommend that you have a technician service the door and watch him to see the process, so if you need to tighten the screws again, at least you will know how.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services
Thank you for using Manage My Life.