BYD Dolphin windscreen fogging: how to demist it

China-market owner report

In a discussion dated 2022-02-04, the linked China-market report raised this issue: A Dolphin owner described persistent window misting and cabin odour; their theories about airflow are unverified. This is an individual account, not a confirmed diagnosis or failure-rate finding. The steps below use the export handbook.

Checks to make while safely parked

1. 1Stop safely if sight is restrictedDo not continue towards a junction with an obscured windscreen. Pull over safely if needed and keep your attention on the road while the glass clears.
2. 2Use the front defrosterSelect the front windscreen symbol, rather than the rear-window heater. The documented function changes air distribution and turns the A/C on for demisting.
3. 3Check moisture and airflowUse fresh air as described in the cold-weather precautions after warming the cabin. Keep intake grilles and the space under the front seats clear for circulation.
4. 4Verify before moving onConfirm the windscreen and side-window viewing areas are clear. Adjust temperature and fan output for the conditions; do not switch demisting off simply to meet a range target.

Tick steps as you go. Your progress stays in this tab.

Check the result and know when to stop

If the correct controls cannot keep the glass clear, document temperature, rain, passenger load and which side of the glass is misting. Arrange an A/C assessment. The Chinese owner’s theory about the intake is unverified and does not justify changing vents or copying a fixed temperature as a universal cure.

Common questions