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November 17, 2020 Service bulletin

HVAC system blows hot air under acceleration.

Mazda technical service bulletin SA-057-20a for 2019-2021 Mazda MAZDA3 and 2020-2021 Mazda CX-30.

Bulletin number
SA-057-20a
Component
Equipment
Summary
HVAC SYSTEM BLOWS HOT AIR UNDER ACCELERATION. Some customers may complain that the HVAC system blows hot air on occasion (blows cold air, then hot air, then cold air again). The customer may notice that it is more pronounced when they first start driving the vehicle and/or when accelerating.

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