Summers in Olympia, WA are milder than other parts of the country, but our humidity often makes up for it, and an air conditioner is the best defense against those periodic heat waves. Leaking refrigerant ranks among the most common problems an AC system can experience, and something any prudent homeowner should attend to quickly before the temperatures spike. Refrigerant is the gas that makes air conditioning possible. When it leaks, it slows down the efficiency of your AC unit and can cause more serious problems if left untreated. Here are 3 signs of refrigerant leaks: