

A hissing or buzzing sound from the AC, often near the dashboard or under the hood. This can be normal refrigerant flow or a sign of a leak or valve issue.
Find a ProviderA brief hiss as pressures equalize can be normal. A loud or continuous hiss, especially with weak cooling, suggests a leak.
A persistent buzz can be an electrical solenoid or a struggling compressor and is worth a diagnostic.
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