Used the learning function to control my AC. I have noticed that you have to be pointing the G3 right at the receiver on the AC or it just doesn't work. Seems like the G3s IR blaster only shoots in straight lines, not like a traditional IR remote for a TV.
I had this exact issue with my Frigidaire air conditioner as I lost the remote and Smart Remote anymote worked just fine even if I couldn't use the learn mode.