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Service bulletins for the 2021 Jeep Grand Cherokee

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1325 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
24006232023-10-02. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C Diagnostic LOP Change
24006232023-08-21. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C Diagnostic LOP Change (Except Alfa Romeo Vehicles)
S23240000092023-08-21. Service bulletin. VISIBILITY; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Driver Side Vents Blow Warm/Cool Air On When Using AC.
0804322REVC2023-01-09. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following: During a remote start, the heated wheel, seat, mirrors and/or the Electric Back Light (EBL) may not turn on. High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar1-2 and rear airflow at blower bar 5-7
Z33-12023-01-09. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer Satisfaction Notification Z33 Heating Ventilation AC Module
S22240000052022-12-19. Service bulletin. ELECTRICAL SYSTEM:WIRING:CONNECTORS/PLUGS/RECEPTACLES; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; UNKNOWN OR OTHER. Front HVAC Vents Default To Defrost, Driver Side Only Blows Cold.
90045262022-12-19. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. COMPRESSOR, Air Conditioning HVAC not blowing cold air, or does not work as designed. Please ensure the HVAC control module is at the latest software level prior to replacing the compressor as per Star Online publication S2224000003. Any questions, or concerns please contact FCA Redacted Content. If no response in 15 minutes, proceed with repair. Software is available for 21MY per TSB 08-043-22 Rev. B and for 22MY per CSN Z33.
0804322REVC2022-10-31. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following: During a remote start, the heated wheel, seat, mirrors and/or the Electric Back Light (EBL) may not turn on. High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar1-2 and rear airflow at blower bar 5-7
0804322REVC2022-10-31. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following: During a remote start, the heated wheel, seat, mirrors and/or the Electric Back Light (EBL) may not turn on. High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar1-2 and rear airflow at blower bar 5-7
S22230000562022-10-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Defroster Grille Has A Gap And Or Warp
S21240000092022-10-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Whistle Noise Heard When Operating AC
S21240000082022-10-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Poor Airflow From 2nd Or 3rd Row Vent Outlets
0804322REVA2022-10-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following:High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar 1-2 and rear airflow at blower bar 5-7.
S22240000032022-10-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ENGINE AND ENGINE COOLING. AC Does Not Blow Cold (Rev. A not indicated on final document)
TSB0804322RevB2022-10-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. AC Does Not Blow Cold
S21240000042022-09-26. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C does not cool and vehicle is low on Freon charge but no leak is found with sniffer or black light anywhere in the system
08043222022-09-26. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin involves reprogramming the HVAC module with the latest available software.
0804322REVA2022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:COMPRESSOR:MODULE (ACCM). Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following:High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar 1-2 and rear airflow at blower bar 5-7.
Z33Revision12022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:COMPRESSOR:MODULE (ACCM). Customer Satisfaction Notification Z33 Heating Ventilation AC Module
S22240000032022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. AC Does Not Blow Cold (Rev. A not indicated on final document)
S21240000142022-09-15. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:AIR HANDLER/CHAMBER, DUCTS, AND VALVES. Customer Indicates No HVAC Airflow To The 3rd Row
S21240000142022-08-22. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Customer Indicates No HVAC Airflow To The 3rd Row
0804322 REVB2022-05-31. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following: High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar 1-2 and rear airflow at blower bar 5-7
0804322 REVA2022-05-31. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following:High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar 1-2 and rear airflow at blower bar 5-7.
Customer Satisfa2022-05-31. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Customer Satisfaction Notification Z33 Heating Ventilation AC Module

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.