I was surprised when I heard some actually loud banging coming from the garage one day.
It was my child banging on the window air conditioning system unit with a hammer. I asked him what in the world was going on and he said usually the air conditioning system would start working when he hit it with a hammer. I told him that there was no way to treat the window air conditioning system but I was surprised when it started working after another hit with the hammer, but regardless, I figured there was easily some loose wire in there or something. All of us both ended up opening up the thing and sure enough the two of us were able to spot the wire that was loose. All it took was my soldering iron and a little solder to get the wire secure so the window air conditioning system would never stop working. I told my child that was all there was to it and it was actually unnecessary to bang the cooling equipment with his hammer like that. After showing my child that, it gave him a fascination with repairing unusual gadgets around the house, however he even went to junkyards to option up old window air conditioning system units and multiple appliances. Suddenly, he had a storage of window air conditioning system units in the garage. When I asked him what he was doing with all those units, he said he wanted to repair them up and sell them. Sure enough, he worked hard to repair every single one and he was able to make a profit. Ever since, he has been seeking all types of junk to sell, but he does make pretty unbelievable money doing this.