The AC is on but air comes out warm or even hot. This usually means the system isn't cooling at all — a refrigerant, compressor, or control problem.
Find a ProviderIntermittent hot air often means a failing compressor clutch or an electrical fault that cuts cooling under certain conditions.
The engine thermostat affects heat, not AC. Warm AC air is a cooling-circuit or control issue, not the engine thermostat.
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