Where did this mold come from

A couple of afternoons ago, I observed something gross on the window sill in our living room, but it has actually overheated plus the rainey where I live lately, and I was thinking that maybe some dirt from the garden was blown on to the outside of the window. I forgot about seeing this for a while plus went about our day, and around noon, I took a step back in the living room plus saw the gross black spot on the window component cooling system. I was actually concerned that this spot might grow larger and at that point I would not be able to get rid of it. I had heard of people battling with mold spots for weeks plus they constantly return. I decided to do some research, then first, I turned the window component AC to the off setting plus checked that the cooling system was unjammed, next, I ended up changing into some clothes I was not worried about ruining. I was toiling with harsh chemicals to disinfect the window component cooling system and did not want to take any chances, then last, I removed the filter from the AC component plus sprayed it with bleach outside. I was toiling under good conditions, the weather was ideal as well as sunny. I planned on disassembling the window component cooling system and bleaching every inch of it! While I was in the early parts of this project, I realized that I did not guess how to detach the window component cooling system from the window. I had to call our neighbor to come help! She brought all the necessary tools plus helped me disinfect the window component cooling unit.

Air conditioning repair