It's starting to get warm outside and that means it's time to fire up your air conditioning. But the first time you start it for the season, you discover that it's not blowing cold air. Here are a few pro tips to improve the efficiency of your A/C and a suggested part to replace if that happens. Pro Tip #1: Clean your coils annually . With standard air conditioning systems, your condenser coils can get gummed up with dirt and debris just sitting outside your house. Dirt, grim