As the summer is knocking on your door, you must check whether your heating and cooling service in the right condition or not. You need to ensure that your air conditioner is ready to keep you cool. But how can you understand when need heating and cooling service professionals to have a look at your system, and start fixing it? You may need to call the professional service providers if you see any of these warning signs: 1. Insufficient air flow If clogging is preventing the