As a business owner, the last thing you want is for your AC to break down in the middle of a hot summer day. This could lead to a loss of productivity, customers, and revenue. Maintaining your AC unit is, therefore, crucial to keep your business running smoothly. It's important to know the signs that your AC unit needs repairs before it stops working altogether. Here are five signs that indicate it's time to call in a professional to repair your store's AC unit.