Why Is My AC Not Cooling? Few home problems get your attention faster than an air conditioner that runs without cooling the house. During a hot, humid Springfield, Illinois summer, even a small HVAC problem can quickly turn into an uncomfortable and potentially unsafe situation. The good news is that an AC system that is not cooling does not always need to be replaced. The cause may be as simple as a clogged air filter, an incorrect thermostat setting, or debris blocking the
