AC not cooling your home? Learn the most common causes, repair costs, and when replacement makes more sense.
When your air conditioner runs but does not cool your home, the causes range from simple filter issues to major component failures.
A clogged filter restricts airflow, causing the evaporator coil to freeze and reducing cooling capacity.
If refrigerant levels are low, there is a leak. The system cannot absorb enough heat to cool effectively.
The outdoor coils release heat. Dirt and debris block heat dissipation.
Capacitors start the compressor and fan motors. A failed one prevents the compressor from running.
Ice on the coil blocks airflow and heat absorption, usually from low refrigerant or dirty filters.
The compressor circulates refrigerant. When it fails, no cooling occurs.
| Repair | Cost Range |
|---|---|
| Air filter replacement | $15 – $50 |
| Capacitor replacement | $150 – $350 |
| Refrigerant recharge + leak repair | $300 – $1,500 |
| Evaporator coil replacement | $800 – $2,000 |
| Compressor replacement | $1,500 – $3,000 |
If your AC is over 12–15 years old and the repair costs more than 50% of a new system, replacement is usually the smarter financial decision.
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