Question: why is my air conditioner running but not cooling the house?
Answer: If your AC system is low on refrigerant, it won't cool your home as well as it normally would. Here's the thing: Refrigerant runs in a closed loop through your system. So, if your system is low on refrigerant, it means you have a leak. ... Frozen refrigerant line on your outdoor unit (you'll see the ice buildup)