I don't remember, but it seems likely it was F8

http://www.appliancehelponline.com/frigidaire.html

If you can get someone to help you move the stove, it might be possible that by now the stoves state has cleared and it'll stop trying to re-activate the self-cleaning mode. (we tried unplugging it for a few minutes, but that didn't work). If that doesn't work, you'll probably find out what the actual error code was. :)