- Freon Levels: A common cause for such AC behavior is low Freon levels. If the Freon is insufficient, it may not cool the entire evaporator core, leading to cold air on one side and warm air on the other. It's essential to ensure the correct Freon amount, as overcharging can also lead to issues.
- Use of Refrigerant Kits: While using kits like AC PRO R134A can be a DIY solution, they often lack precision. For systems requiring a specific amount of refrigerant, professional servicing is recommended to avoid overcharging.
- Blend Door Malfunction: The blend door controls air temperature by mixing hot and cold air. If this mechanism is faulty, it can result in uneven cooling. This is particularly likely if your car doesn't have dual climate control.
- Evaporator Issues: The refrigerant enters the evaporator, and if it's low, only part of the evaporator might be functioning correctly, causing the uneven cooling.
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