Hi I am trying to get one more year out of my aging air conditioner. The issue is that it periodically shuts off when it is very hot outside. If I take the electrical panel cover off and hit the reset button it’ll start up again and work for another half hour to hour when it will shut off again. I don’t know anything about air conditioners but I’m mechanically and electrically inclined. Is there some basic troubleshooting I can do to isolate the issue? Any idea which component might be faulty? I’ve included a pic of the model number. It’s a Lennox. I really appreciate the help.