The A/C MAX mode is used to cool the inside of the vehicle more quickly. Air flow is directed toward the upper body and face.
In this mode, the air conditioning and the recirculated air position will be selected automatically.
After the vehicle interior has cooled down initially, resume using normal A/C mode. Continuous use of A/C MAX mode is not recommended.
Hyundai Sonata LF 2014-2019 Service Manual: Audio Remote Control (Sonata Sports) Schematic Diagrams
Circuit Diagram
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Hyundai Sonata LF 2014-2019 Service Manual: In-car Sensor Repair procedures
Diagnosis With GDS
1.
The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).
? The diagnostic system (GDS) provides the following information.
(1) Self diagnosis: Checking the failure code (DTC) and display.
(2) Current data ...