The answer to 'why is my AC' is that there are several common causes for an air conditioning system not functioning properly. Some of the most frequent issues include a clogged air filter, low refrigerant levels, a faulty compressor, or problems with the electrical components.
Symptoms of an AC problem can include the unit not turning on, poor cooling performance, strange noises, or high energy bills. Homeowners should first check the air filter and ensure it is clean. If the filter is dirty, replace it. They can also inspect the outdoor unit for any debris or obstructions. However, more complex issues like refrigerant leaks or compressor failure will likely require a professional HVAC technician to diagnose and repair.