Checking air conditioner. How to avoid stings from wasps ?

You can have someone outside watch the A.C. Go inside and bang inside the A.C., especially on top, but use caution with the cooling fins. The person should see dome fly out if you have a nest. If you do, put a big black bag over it in the early AM and leave it in the sun during the hottest part of the day. Should kill a lot of them.