Why are the air dampers not responding to the mode switch changes

Asked by MarksMPV Jul 12, 2020 at 03:50 AM about the 2004 Mazda MPV GX

Question type: Maintenance & Repair

On a Mazda MPV 2004. When we move the mode switch he changes can be
seen on the screen but the air flows do not change. Ie we can't get any air into
the windscreen or the foot well. At the moment we only get air coming  out of
the face vents on the centre console

2 Answers

136,215

Inside the dashboard there's an HVAC system that uses blend doors to direct air to various vents. At least one of your blend doors has a defective actuator that isn't moving air to where you want it. the doors are moved by actuators and at least one of yours is defective; you've probably heard a clicking sound coming from the dash because if this. You need to replace the defective actuators, but this can be a difficult job, as it might entail removing part of the dashboard.

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