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What's the deal when the air conditioning tech tries to sell you a new system because of Freon?
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How to Put Freon in an AC Unit (with Pictures) - wikiHow
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Is Your AC Unit a Phased-Out R-22 Freon Model? - Tiger Home & Building Inspections
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Does your AC need Freon? If so, you have a bigger problem.
All About Freon: A Molecule Associated With Your A/C Unit | Great Dane Heating & Air Conditioning
5 Signs Your AC Is Leaking Freon | ClearView Services
