If you’re a homeowner. chances are, you have some familiarity with your home’s HVAC system. Keeping your air conditioning unit in good condition is imperative to keeping your home’s air ducts flowing properly and keeping your home at an optimal temperature. Two-thirds of all U.S. homes have air conditioners, and if you’re suffering from no AC, it’s time to look into an air conditioning repair service. Here are just a few air conditioner red flags. Dirty Filter According to Energystar.gov, most HVAC system filters need to be changed every one to three months, but many homeowners neglect to follow this…