2022-2025 Audi A/C Control Buttons Not Working TSB 2078655/3

Audi has released Technical Service Bulletin (TSB) 2078655/3 to address a common complaint among owners of certain 2022-2025 models: unresponsive or non-functional buttons on the air conditioning control unit. This issue can prevent proper operation of the climate control system.

This bulletin, identified as TSB 2078655/3, provides detailed instructions for diagnosing and resolving the problem, which often involves a specific diagnostic trouble code (DTC) indicating a mechanical fault within the control panel. Owners searching for solutions to their Audi A/C buttons not working will find relevant information here.

Revision History

This Technical Service Bulletin has undergone several revisions to ensure accuracy and updated information:

• Revision 3: The header was revised to include the A5 model F5.
• Revision 2 (July 22, 2025): The warranty information was updated, specifically regarding the service number.
• Revision 1 (July 21, 2025): This marks the initial publication of the bulletin.

Symptoms of Unresponsive A/C Buttons

Owners may notice that one or more buttons on the A/C control unit in their vehicle are not working. This can manifest as buttons failing to respond to presses, making it difficult or impossible to adjust climate settings. The issue specifically affects the A/C control panel located underneath the main display, as depicted in Figure 1 of the original bulletin.

Technical Background

The underlying cause for the Audi A/C buttons not working issue is attributed to internal voltage conditions within the A/C operating unit component. These voltage fluctuations can lead to restricted functionality and reduced sensitivity of the buttons on the unit, ultimately causing them to become unresponsive.

Fault Codes / DTCs

When the condition of unresponsive A/C control buttons occurs, technicians may find a specific diagnostic trouble code (DTC) stored in the vehicle's event memory. This code helps pinpoint the nature of the fault and is crucial for proper diagnosis.

Code	Description	Diagnostic Address
B131207	Button(s) in control panel, mechanical fault	0008

The presence of "B131207: Button(s) in control panel, mechanical fault" in diagnostic address 0008 confirms the issue is related to the physical buttons on the A/C control panel.

Diagnosis and Repair Procedure Summary

Audi's workshop findings confirm that the complaint of unresponsive A/C control panel buttons can be reproduced during diagnosis. The repair procedure outlined in TSB 2078655/3 involves a specific sequence of steps to determine if the A/C operating unit is defective and requires replacement.

1. Initial Check: If the button or buttons on the air conditioner operating unit are behaving as described (unresponsive), the technician will proceed with the diagnostic steps.
2. Unit Removal and Reinstallation: The entire A/C control unit must be carefully removed from the vehicle and then unplugged. Following this, the same A/C control unit is to be refitted back into the vehicle. This step helps to reset the unit and re-establish connections.
3. Event Memory Check: After reinstallation, the vehicle's event memory is checked again for the presence of the diagnostic trouble code "B131207: Button(s) in control panel, mechanical fault".
4. Replacement Decision: If the complaint persists and the "B131207: Button(s) in control panel, mechanical fault" DTC is still present after the removal, unplugging, and refitting process, then the air conditioner operating unit is deemed defective and replacement is recommended.

Required Documentation for Warranty Claims

For any warranty claims related to this issue, Audi requires specific documentation. When billing for the repair, a video that clearly shows the complaint must be attached to DOC-IT. This video serves as a critical reference for the claim and parts analysis.

The video documentation must adhere to the following guidelines:

• It must include the Vehicle Identification Number (VIN) and the date of the recording.
• The video must not be edited.
• It should be in focus and recorded with sufficient light. High resolution is not strictly necessary.
• If appropriate, the technician should mark the location of the problem within the video to provide parts analysis with a clear reference to the complaint.
• It is crucial to ensure that the video documentation does not show any people and/or faces, license plates, or customer-specific data to protect privacy.

Warranty Information

This Technical Service Bulletin provides specific details regarding warranty claims for the Audi A/C buttons not working issue.

• Claim Type: If the vehicle is outside of any warranty, this Technical Service Bulletin is for informational purposes only. This means that while the bulletin provides diagnostic and repair guidance, the cost of the repair will not be covered by Audi if the vehicle's warranty has expired.
• Service Number: 8704
• Damage Code: 0010
• Labor Operations: Specific labor operations and associated time units (TU) are provided for technicians:
  • Remove and install/replace button(s): Labor codes 8704 19xx / 8704 55xx. Technicians should refer to the Standard Repair Time (SRT) system for associated operations.
  • Check operation: Labor code 8704 0199, allocated 5 TU.
  • GFF / Guided Functions: Labor code 0150 0060. The labor time for this operation is determined according to the diagnostic log.
• Claim Comment: All claims should include "As per TSB 2078655/3" in the claim comment section.

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi Warranty.

Important Considerations for Technicians

Audi emphasizes that all part and service references provided in TSB 2078655/3 are subject to change and/or removal. Technicians are advised to always check with their Parts Department and/or ETKA (Electronic Parts Catalog) for the latest information and parts bulletins. Additionally, the Repair Manual should be consulted for details on fasteners, bolts, nuts, and screws that require replacement during the repair process.

©2025 Audi of America, Inc. All rights reserved. The information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

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Source: NHTSA ID: 2078655/3