Service bulletin Z33Revision1
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10220763 |
| Published by NHTSA | 2022-09-26 |
| Manufacturer's number | Z33Revision1 |
| Manufacturer's date | 2022-03-18 |
| NHTSA component | VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:COMPRESSOR:MODULE (ACCM) |
NHTSA's summary
Customer Satisfaction Notification Z33 Heating Ventilation AC Module
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Glass, wipers and mirrors, Heating and air conditioning, A/C compressor
| JEEP GRAND CHEROKEE | 2021 |
|---|---|
| JEEP GRAND CHEROKEE 4XE | 2022 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 0804322REVA | 2022-09-26. Service bulletin. 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. |
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