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The relay in your vehicles air conditioning system controls when the fan is turned on at the condenser. If the refrigerant is too cold it stays off, and it turns on if the refrigerant is too warm. A faulty relay switch will cause the A/C to work very poorly - fluctuations in air temperature from the vents in your cabin are a major symptom. If you have diagnosed the issue as a faulty relay, get in touch with Otto's expert advisors for a new part.
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