A dirty-sock or mildew smell when the A/C kicks on means moisture and organic growth on the evaporator or in the cabin air path — unpleasant, and worth clearing for air quality.
Start with the cabin air filter — cheap and often overdue. If the smell persists, an evaporator cleaning service and clearing the drain line handles the source rather than masking it.
Related services in Florida typically run $60–$1,300 depending on what the diagnosis finds:
| A/C performance check | $60–$150 |
| A/C recharge | $150–$350 |
| Compressor replacement | $600–$1,300 |
| Condenser replacement | $500–$1,000 |
See the full car ac repair cost guide →
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It can aggravate allergies and asthma; it's air you're breathing, so it's worth addressing.
The blower pushes air over the damp evaporator where growth accumulates overnight.
Surface sprays help mild cases; established growth on the evaporator usually needs a proper cleaning service.
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