2021-2022 Audi HVAC Blower Adjustment Not Possible TSB

Symptoms of HVAC Blower Adjustment Not Possible

Owners of certain 2021-2022 Audi models may experience an intermittent issue where the Audi HVAC blower adjustment not possible. This problem manifests as the fan control strip in the lower HVAC screen failing to appear. When this occurs, the "fan control strip blank" condition means that the fan speed cannot be controlled through the infotainment system.

Workshop findings confirm that this symptom can be difficult to reproduce. However, when the issue is present, the center strip for fan control is visibly blank on the screen, making it impossible to adjust the fan speed. This is an intermittent symptom in the infotainment system.

Technical Background

Audi has identified this as an intermittent symptom related to the vehicle's infotainment system. The technical background regarding this issue is currently under analysis, and a service solution is actively in discussion. This indicates that the problem is software-related rather than a mechanical failure.

Repair Procedure Summary

Audi Technical Service Bulletin 2071139/1 outlines a simple procedure to resolve the "HVAC blower setting adjustment not possible" issue. If the fan control strip disappears, the recommended fix is to restart the MMI (Multi Media Interface) system.

To perform an MMI restart:

1. Locate the on/off button for the MMI system.
2. Press and hold this button for at least 10 seconds.
3. The MMI system will restart, which typically takes less than a minute.

This restart process should restore the fan control strip to the screen, allowing normal adjustment of the HVAC fan speed. This procedure can also be found in the owner's manual under "Restarting the MMI."

Important Warnings

Audi explicitly states a critical warning regarding this issue:

"Do not replace any parts should the vehicle exhibit this symptom. Parts replacement will not solve this issue. Any parts replaced for this condition under warranty will be debited."

This means that owners should not attempt to replace any HVAC components or infotainment system parts if they encounter the "HVAC blower setting adjustment not possible" problem. Such replacements will not resolve the underlying intermittent software symptom and will not be covered under warranty.

Owner Action

If you experience the "Audi HVAC blower adjustment not possible" symptom in your 2021-2022 Audi, the first step is to perform an MMI system restart as described in Technical Service Bulletin 2071139/1. This simple procedure is designed to restore the fan control functionality. Since this is an intermittent software issue, there are no parts to replace, and the fix can be performed by the owner. If the problem persists after an MMI restart, or if you have any concerns, it is advisable to contact an authorized Audi service center.

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Source: NHTSA ID: 10241430