Field Notice: FN74300 - Cisco Room Bar is Shutting Down Due to Overheating - Replace on Failure

Available Languages

Updated:October 10, 2025
Document ID:FN74300

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

Medium
Impact Rating:
Medium
First Published:
2025-Oct-10
Last Published:
2025-Oct-10
Revision:
1.0
Cisco Bug IDs:

Notice

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Products Affected


Affected Product Name Description Comments
CS-BAR-C-K9= Cisco Room Bar, Carbon Black - SPARE (Service Unit Only)  
CS-BAR-K9++ Cisco Room Bar in First Light w/Navigator(Table Stand)-TAA  
CS-BAR-K9-RF Cisco Room Bar UNIT - First Light Color REMANUFACTURED  
CS-BAR-K9= Cisco Room Bar, First Light - SPARE (Service Unit Only)  
CS-BAR-NR-K9 Room Bar in First Light w/Navigator(TableStand)-NO RADIO  
CS-BAR-NR-K9++ Room Bar in First Light w/Navigator(TableStand)-NO RADIO-TAA  
CS-BAR-NR-K9= Cisco Room Bar, NoRadio - SPARE (Service Unit Only)  
CS-BAR-T-C-K9 Cisco Room Bar in Carbon Black w/Navigator(Table Stand)  
CS-BAR-T-C-K9-RF CiscoRoomBarinCarbonBlackw/Navigator(TblStnd) REMANUFACTURED  
CS-BAR-T-C-K9-WS CiscoRoomBarinCarbonBlackw/Navigator(TableStand) REFURBISHED  
CS-BAR-T-K9 Cisco Room Bar in First Light w/Navigator(Table Stand)  
CS-BAR-T-K9-RF Cisco Room Bar w/Table Stand Navigator REMANUFACTURED  
CS-BAR-T-K9-WS Cisco RoomBarinFirstLightw/Navigator(TableStand) REFURBISHED  
CS-BAR-W-C-K9 Cisco Room Bar in Carbon Black w/Navigator(Wall Mount)  
CS-BAR-W-K9 Cisco Room Bar in First Light w/Navigator(Wall Mount)  




Defect Information


Defect IDHeadline
CSCwi56875Room Bar is crashing due overheating

Problem Description


Cisco Room Bar is encountering a shutdown that is caused by overheating. The issue may manifest itself as sudden device shutdown or the appearance of temperature-related error messages.


Background


The issue has been identified as stemming from the hardware being unable to detect FAN0, as reflected in the log files.

Affected Cisco Room Bar devices share specific hardware characteristics, and the occurrence of this issue may be influenced by certain hardware power-on flags and boot version configurations.


Problem Symptom


The Cisco Room Bar shuts down and requires a user to physically power it back on using the power button, or the system displays warnings regarding hot temperature in Webex Control Hub or in the diagnostics found on the unit web interface.

The following image is an example of a high device temperature warning shown in Webex Control Hub:


Workaround/Solution


Workaround

No workaround is currently available.

Solution

If a Cisco Room Bar device is experiencing the problem symptoms, users are advised to initiate a replacement process. For information about requesting a replacement, see the For More Information section of this field notice.

For any other hardware-related issues with the Cisco Room Bar, users with an active service contract are advised to follow the standard Cisco Return Material Authorization (RMA) process.


How to Identify Affected Products


The rating label with the serial number and PID/VID information can be found on the back of the Cisco Room Bar. Validate the PID against the Affected Product Name information listed in the Products Affected section of this Field Notice and use the Serial Number Validation Tool to verify whether the Cisco Room Bar is impacted by this issue.

The Cisco Room Bar serial number can also be located using the Cisco Room Navigator. To access the settings menu and find the serial number information, do the following:

  1. Choose My System in the top left corner. 
  2. Choose Settings.
  3. Choose About this device.
  4. Choose Serial Number.

The available settings depend on which device and what has been enabled by the administrator.

Access_Codec_Serial_Number.jpg


Serial Number Validation


Cisco provides the Serial Number Validation Tool to verify whether a device is impacted by this issue. To check the device, enter the serial number in the Serial Number Validation Tool.

Important: For security reasons, you must click the Serial Number Validation Tool link that is provided in this section. Do not copy and paste the link into a browser. Use of the Serial Number Validation Tool URL external to this field notice will fail.

Revision History


VersionDescriptionSectionDate
1.0Initial Release—2025-OCT-10

For More Information

For further assistance or for more information about this field notice, contact the Cisco Technical Assistance Center (TAC) using one of the following methods:

Receive Email Notification About New Field Notices

To receive email updates about Field Notices (reliability and safety issues), Security Advisories (network security issues), and end-of-life announcements for specific Cisco products, set up a profile in My Notifications.

Was this Document Helpful?

FeedbackFeedback

Contact Cisco

This Document Applies to These Products