Some customers may complain that the A/C blows warm air while idling after restarting a warm engine
Mazda technical service bulletin 07-005-20-3745 for 2019-2020 Mazda MAZDA3 and 2020 Mazda CX-30.
- Bulletin number
- 07-005-20-3745
- Component
- Engine and engine cooling
- Summary
- Some customers may complain that the A/C blows warm air while idling after restarting a warm engine. This is caused by improper control software of the PCM not allowing the active air shutter to open properly, resulting in lower cooling performance at idle. To eliminate this concern, the control software of the PCM has been modified.
Owners of these vehicles have filed 18 complaints in the engine category.
Vehicles covered
- Mazda MAZDA3 2019-2020 20192020
- Mazda CX-30 2020 2020
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