Here's another test you can try. Open the Ador panel and disconnect the battery. Now look at the circuit board which is mounted vertically on the right side of the battery compartment. There is a row of electronic connector pins sticking up along that board. They are numbered 1-6, #1 is furthest away from you, #6 is the closest. You should notice a plastic jumper sitting on top of pins 1 & 2. This jumper simply connects those two pins. Remove the jumper by pulling it straight up and off. Careful... if you drop it you may never see it again.
Now reconnect the battery. The door should close and stay closed. The reason being that without pins 1&2 connected, the Ador is now looking at the voltage across pins 2&3. It is assuming that you are not using the built-in light sensor but instead have installed your own device across pins 2&3. Since there is nothing there, that tells the Ador that it is pitch dark and the door should close.
If that works, now put that jumper back across pins 2&3, which connects them. This will make the Ador think that it is daylight and it should now open the door and stay open. Did it beep? It should before opening or closing. Repeat the jumper on and off procedure a few times and see if it responds.
If these things are not working, your circuit board is very likely hosed. No need to continue. If it is working continue below.
The first 5 minutes after battery connecting the Ador is in "test mode" which makes it very responsive and uses a bit more power. So wait 5 minutes and maybe a few more for good measure. You are now in low power operation mode which is less responsive, and also does some light sample averaging before it decides the door should open or close. So now try the jumper test again, do NOT disconnect the battery. It may take as long as 10-15 minutes before it decides to operate the door in one direction, and up to 5 minutes in the other direction. I don't remember which. So if it doesn't respond in say 20 minutes, you're done, it's not working.
When your done testing, put the jumper back on pins 1&2 and cycle the battery connection. Contact Ador via email from their web site and tell them what your first problem was, and the results of the above test, whether it failed or not.
Likely, either your light sensor is failing, or your circuit board has some issue. Either way, a new circuit board would be in order since the light sensor is component soldered directly onto the circuit board.