Jeep Grand Wagoneer 2023 — technical service bulletin
Bulletin 2400823 · NHTSA communication 10242840 · issued Jul 29, 2023
Technical service bulletin
communication type
Electrical System
component
2023
model years
2
vehicle entries
Official summary
Flash: Heating, Ventilation and Air Conditioning (HVAC) Module Updates Customers may experience one or more of the following HVAC A/C cool down concerns: ? Insufficient A/C performance for both the first and second row comfort. ? Poor heated/vented seat performance This bulletin involves reprogramming the HVAC with the latest available software.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.