2022-2025 Audi A4, A5, Q5 AC Buttons Not Working TSB

Symptoms of Non-Responsive AC Buttons

Owners of certain 2022-2025 Audi A4, A5, and Q5 models may notice that one or more buttons on their air conditioning operating unit are not functioning correctly. This can manifest as a complete loss of functionality for the climate control system, specifically impacting the display control head for the A/C system. If your Audi Q5 AC buttons are unresponsive, this technical service bulletin addresses the potential causes and solutions.

Fault Codes and Diagnostic Trouble Codes (DTCs)

When the AC buttons are not working, technicians may find specific diagnostic trouble codes (DTCs) stored in the vehicle's HVAC electronics module. The primary DTC associated with this issue is:

This code, "B131207: Button(s) in control panel, mechanical fault," indicates a mechanical issue with the buttons on the A/C control panel.

Diagnosis and Trigger Conditions

The problem of non-functioning AC buttons can often be reproduced during workshop testing. The core issue stems from internal voltage irregularities within the A/C control unit component. These voltage fluctuations can lead to restricted functionality and reduced sensitivity of the buttons on the AC operating unit. When this occurs, the diagnostic address 0008 will log the event memory entry "B131207: Button(s) in control panel, mechanical fault." This confirms the presence of the mechanical fault within the control panel.

Repair Procedure Summary

Audi Technical Service Bulletin 2078655/2 outlines a specific procedure for addressing this issue. Initially, if the buttons on the air conditioner operating unit are behaving as described, the entire unit should be removed from the vehicle and unplugged. Subsequently, the same A/C control unit is then fitted back into the vehicle. After this reinstallation, the event memory should be checked again for the "B131207: button(s) in control panel, mechanical fault" entry.

If the complaint persists after this initial process, it indicates that the air conditioner operating unit is indeed defective and requires replacement. For warranty claims, it is crucial to attach a video clearly demonstrating the complaint. This video must include the VIN and date, be unedited, in focus, and taken with sufficient light. It should also avoid showing any personal data like faces or license plates. This detailed process helps ensure accurate diagnosis and proper resolution for your Audi Q5 AC buttons issue.

Important Warnings for Owners

It is important to note that if your vehicle is outside of its warranty period, this Technical Service Bulletin 2078655/2 is provided for informational purposes only. Any warranty claims submitted must adhere strictly to the Audi Warranty Policies and Procedures Manual.

Owner Action

If you are experiencing issues with non-responsive AC buttons in your 2022-2025 Audi A4, A5, or Q5, it is recommended to visit an authorized Audi service center. They will be able to perform the necessary diagnostic checks, including scanning for DTC B131207, and follow the repair procedure outlined in TSB 2078655/2. This will ensure that your Audi Q5 AC buttons are properly diagnosed and repaired according to manufacturer specifications.

Source: NHTSA ID 11021478