When you toil at a heating & a/c supplier as one of their most certified heating & cooling specialists you get all kinds of heat & a/c repair thrown at you. This is every single day of the toil week with no letting up, but periodically you get real hard heating & a/c repairs. When this happens you undoubtedly have to give your all to be able to repair the concern & get the job done. This happened the other day when I had to repair this one commercial heating & air conditioner in an office building. It was possibly the worst & most strenuous heat & a/c repair I ever had in my entire life! But using all of the heating & a/c repair skills that I learned in heating & cooling school I was able to get by & get it all fixed. But the job itself took me more than 2 hours. Well, maybe not totally several, however it took almost 4 hours to repair the commercial heating & air conditioner. But when I finally fixed it I felt fantastic because I knew I just completed a absolutely hard task & this was the fantastic feeling of success. When I got back to the heating & a/c office I was glad to report everything that I did to the management. They were as proud of me as I was once they found out how strenuous the whole job was. This was the most hard heating & a/c repair to date.