There are a number of reasons why you may find that your oven door won't close properly, and troubleshooting oven doors is not too complicated, so you should be able to manage this in a few hours. When you are trying to decide what is the cause of your oven door not shutting properly, you should be able to identify the different problems, and also understand how to repair the door without too much difficulty. If you find a lot of problems, then you may need to provide a different solution, for example replacing the door and fittings completely.
Latch Is Broken
This is perhaps the most common cause of the oven door not closing properly. The latch is supposed to connect to a hole in the oven itself, but sometimes the latch can become stuck, and it may also be improperly greased. If the latch is sticking, then you should try adding a drop of oil, and trying again. Other reasons for the latch not closing properly include dirt being trapped in the hole on the other side, or the latch itself being cracked and not fitting correctly into the hole. The latch can also be completely replaced if you find that you have repeated problems with it.
Door Doesn't Fit
The warming and cooling of the oven door can cause it to move out of lineament with the frame in which it is supposed to sit. One example of this is the problem with the latch, where it no longer connects with the hole, but misses it either up or down. The door can be moved back into position by tightening the screws around the frame so that it sits more securely against the frame.
Sometimes you may find that the door fits or otherwise depending upon whether the oven is in use, and this is perhaps the most difficult to find a correct solution to. You can attempt to fix the door by screwing it in more tightly, but this may mean that it becomes moved out of alignment when the oven is cold. The answer to this problem might be simply to replace the door completely.
Hinge Doesn't Work
Another problem with closing the oven door might be that the hinge, which holds the door onto the frame, becomes stiff and difficult to move. If the hinge becomes dirty, or rusty, you may find that the door won't turn completely, and this will prevent the door from closing properly. You may also find that the hinge moves out of alignment and prevents the door from fitting into the frame. Either tighten the frame, or take the door off of the hinges, and remove and clean the hinge using some soapy water. If the hinge is rusty then you should simply replace it completely, and then replace the door.
Trying these solutions should help you to close the door properly.That's all there is to troubleshooting an oven door that won't close properly.