I was doing well and studying a test the other day when I observed that it felt a lot hotter and muggier than usual, despite having the cooling system set below 69 degrees. On most days I have our Heating & A/C system typically worked on and hadn’t observed any troubles or changes in regular use over the past three years or so at least. I walked up to our control component to learn the temperature display and was shocked with what I found. The temperature in the loft was multiple degrees much higher than what I had set to the control component to. The cooling unit was running nonstop but the air coming out of our vents didn’t feel all that cool to the touch. I knew something wasn’t right, however I had no way of knowing on our own, so I rang up my contracted Heating & A/C business to diagnose the problem. Thankfully, he was able to squeeze myself and others in the very next day and he came over right on schedule ready to get to checking it all out. He ran all of his normal tests and finally checked the pressure of the system. Right away, he determined that it was very low on refrigerant. Different than fuel in a car that is consumed as it powers the car’s engine, the refrigerant in an cooling unit stays in a closed loop as it consistently changes from a liquid to a gaseous state and then back to a liquid, and so fourth. However, there are areas where the refrigerant can leak out, and in our case, the small leak was from a cracked evaporator coil. Unfortunately, he had to order the section and schedule the fix up for the following week, although he was able to top off our system with up-to-date refrigerant to get me going until he comes back. I’m very glad that I caught the problem before it caused irreparable injury to the rest of the system.