Windy City Air Conditioning & Heating came out to check the air conditioning unit because it kept getting ice build up. They could not fix the issue that day which turned out to be an electrical issue and wanted to schedule the repair three days out. My father who is elderly could not wait that long for the repair so we had to call out someone else. This was my first time using this company and for finding the issue I certainly think they deserve a four-star rating. They were on time and friendly.