TL;DR Summary Table Common Issue Quick Solution Dirty Cooling Coils Schedule professional cleaning for indoor/outdoor coils. Refrigerant Leak Contact a technician to patch leaks and recharge coolant. Blocked Condenser Clear debris, plants, and dirt from around the exterior unit. Dirty Air Filter Replace your HVAC filter every 1–3 months. Common Causes of Air Conditioner Malfunctions … Continue reading 7 Reasons Your AC Unit Isn’t Cooling