How do I know if my AC system needs repair?

If your AC is blowing warm air, making weird noises, or just won’t turn on, it might need repair. Look for reduced cooling efficiency or strange smells too. If you notice any of these signs, it’s a good idea to call for professional help. Before you call a pro, try changing your filter and allowing the system to defrost for half a day. If the system still isn’t cooling for you, you’ve at least gotten one trouble shooting step out of the way.