Oven door install hinge - KitchenAid Architect Series KEBC177KSS Electric Single Oven

There are two types and they both work to a theme. Modern Oven hinges are inset into the door itself, so you just split the door apart, take the old ones out and the new ones in. The other type have the hinges inside the oven itself between the outside of the oven cavity and the outer panel. With those you pull out or remove the wall oven and look at the back and underneath for the screws. Remove the side panels, remove and replace the hinges.

Door Mounted Hinge

Side Mounted hinge

It's possible that the hinges were not reinstalled correctly, causing the door not to align properly and preventing the locks from engaging. You may need to remove the door again and double-check that the hinges are installed correctly and the door is properly aligned.
If the hinges are properly installed and the door is aligned, the problem may be with the door lock mechanism itself. In that case, it may require replacement or repair by a qualified technician.

I have the same model Miele and ordered a replacement part. I have 2 Miele ovens side by side, and a door hinge on both ovens began to malfunction. I ordered and received the hinge , but when I started to install it, I found that the hinges were fine! The issue was that the 3 screws that hold the hinges to the oven frame came loose. One of them had fallen out on each of the doors, they had to be jiggled in order to close properly, which was not satisfactory. The ovens were installed 13 years ago by the original owners.

You will need to slide the oven out of its enclosed space and unscrew the sheet metal siding in order to gain access so that you can unhook the coil spring attached to hinge. I found that one of the small machine screws has fallen out on the 2 malfunctioning hinges. Once the spring is unhooked, you can align the hinge to screw it back in, and tighten the other screws that hold the door hinges. The screws on the other side has also become loose.

the door is removed with the hinges in place. with the door open, lock the hinge sections together with the little clips on lowest hinge section. When locked, lift up on the door (not the handle) sides, swinging it up until it can be pulled out. Install in reverse order.

Open oven door. Flip metal holder down at hinge to lock hinge. Lift door with hinge attached up slightly and off oven. Reverse to re-install door, making sure notch at bottom of hinge is hooked in frame of oven properly.

Usually you will find a hole in each hinge to hold the hinge open when removing the door.

It is impossible to fight the door hinge springs and remove or install the door.

One opens the door and puts a nail through the hole to keep the hinge open for each hinge.

open the door about 1/3 of the way and lift it off the hinge pins. it helps to have two people do this. when it is time to replace it, put the hinges in that 1/3 open position and slide the door back down on.

Figured it our by myself - the 2 hinges (long and short have to be "hooked" together and then inserted into the oven hinge opening.
After I solved it found the solution is also posted on appliance repairs- how to remove and install oven door. It also posts pictures.
http://www.applianceaid.com/oven-hinges.html

This is a relatively easy fix however you will need to remove the door and it is heavy!

Start by opening the door completely and engage the small "locks" that are at the base of the hinge. This will ensure that the spring loaded hinges do not "spring open" when you remove the door. You then will need to remove the hinges from the door via a series of phillips head screws that hold the hinge assembly in place. The new hinges must be "preloaded" into the Open position using a vise or some means of holding the hinge in place while you use a small section of pipe to provide leverage needed to open the hinge so that the Locks can be engaged.

Once the new hinges are "pre-loaded" and the locks are engaged, you can reverse the procedure to re-install the hinges into the door and re-install the door.

Good luck!!

The hinges are commercially avaialble from Applianceparts.com

It might be because when the door was completely removed ( which they do rather easily for repairs and moving) it wasn't put back properly.
I would suggest you remove the oven door and re install.
You do not remove any screws or anything like that to remove the oven doors.
When you have the oven door open squeeze each hinge and shift then both outwards it will release the door from the hinge, the hinge stays on but the door will slide off the hindge. Afterwards check the alignment and reinstall the oven door