What’s the worst problem a central air conditioner can face? We won’t keep you in—it’s a dead compressor. When you turn on the air conditioning system to cool down your home, and you hear no sound from the outdoor cabinet aside from the fan, the compressor has stopped working. The fault might not be a dead compressor—it could be a failed capacitor or an electrical issue—but it’s a possibility.
The compressor is the literal heart of an air conditioning system. It’s where energy is applied to the refrigerant to make it circulate through the rest of the AC. Without the compressor to turn refrigerant into a high-pressure hot gas, the refrigerant won’t move between the indoor and outdoor coils and cool the inside air of the house.