Car symptom
Air conditioning not cooling
The AC not cooling usually points to gas level, the compressor clutch, or airflow.
Most likely causes
- Low refrigerant (leak)
- Compressor clutch not engaging
- Clogged cabin filter
- Blocked condenser
- Blend door stuck
Checks to run
- Check the fan blows air
- Does the clutch engage?
- Measure refrigerant pressures
- Check the cabin filter
Tools you may need
AC manifold gauges
Multimeter
Confirm before replacing. These are hypotheses to check — never buy parts on a guess. If the fault involves brakes, airbags or fuel under pressure, use a professional.
Advertisement
FAQ
It depends on the cause. Some causes are cheap and quick; others (like a head gasket or seized caliper) need attention soon. Work through the checks in order and confirm before replacing parts.
Start with the free checks listed here. If they involve high voltage, fuel under pressure, airbags or brakes, let a professional handle it.
The interactive diagnostic asks targeted questions to narrow it down, and every cause must be confirmed with a measurement — never guess.