Why does the Audi A4L have higher shift-up RPM when the AC is on?

1 Answers
OCooper
07/29/25 8:48pm
Audi A4L having higher shift-up RPM when the AC is on is a normal phenomenon. Basis for judgment: Because the vehicle's AC is still connected to the car engine, turning on the AC inherently increases the engine load. The engine also needs to increase its RPM accordingly. If the engine power increases, the temperature will naturally rise. Solutions for excessively high RPM: Under normal circumstances, when the car is idling with the AC on, the engine RPM may increase from about 800 to approximately 1500 RPM. An increase to 2500 RPM is considered excessively high, indicating there might be a fault in the engine control system, and the vehicle should be taken to a repair shop for inspection.
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