Rattling, clicking, or grinding when the AC is on. Noises usually come from the compressor, clutch, or debris in the blower, and shouldn't be ignored.
Find a ProviderNot immediately, but a grinding or rattling compressor can fail and contaminate the system, turning a small fix into an expensive one.
The noise appears when the compressor engages — that's why it's tied to switching the AC on.
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