Ya from the look of things it appears that the air door shuts off recirc air when it allows inside air. If that's correct, then air would be blocked if the filter was plugged, and the battery temp would probably rise.

The system knows the outside air temp, and I wouldn't be surprised if it was set up to "throw a code" under cool conditions with the filter blocked. If it's hot out, it will probably be running refrigerant and the air door would be on recirc and it wouldn't matter.

But I definitely don't know for sure. I'd be interested to hear if the code was on the repair ticket.