Air conditioning repair and diagnosis

Cooling failures, airflow issues, and refrigerant questions.

Not cooling
Frozen coil
Refrigerant
Condenser faults

Troubleshooting

1 article

Symptom first, cause second. Start here when something has stopped working.

AC Not Cooling? 7 Causes and How to Fix Each (2026) AC running but not cooling? Work the 7 real causes in order of likelihood: airflow, thermostat, frozen coil, power, capacitor, condenser, refrigerant. Updated Sep 2026