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OWNER ANSWER

DOLPHIN SURF windscreen keeps misting: controls to check

Use the DOLPHIN SURF front-windscreen defrost control to direct air to the windscreen and side windows. It also switches on air conditioning to help remove moisture. Once the cabin is warm, fresh-air mode helps prevent mist returning.

Clearer Glass: Check defrost and fresh air. Concept diagram, not a vehicle-control photograph.

DOLPHIN SURF RHD 07.2024 EN_V0. Controls and equipment must match your car.

  1. Press the front-windscreen defrost button below the touchscreen, or tap its matching windscreen symbol in the A/C panel. Safety note: Stop safely if visibility is obscured and do not continue until the glass clears and stays clear.
  2. Check that air reaches the windscreen and side windows. The front defrost control turns on A/C even if you had switched cooling off; the separate rear-window button does not perform this front-glass function.
  3. Once the cabin is warm, select fresh outside air rather than leaving recirculation selected. If Auto air recirculation when parking is enabled, check whether the inlet mode changes again when stopped.
  4. Check that leaves or snow are not blocking the intake in front of the windscreen and that the space under the front seats is clear.
  5. Keep the compressor enabled while heating if moisture remains a problem. The handbook recommends this to reduce moisture in the airflow.

What success looks like

The windscreen and side windows clear, and fresh-air ventilation helps keep them clear after initial heating. If glass immediately mists again, do not treat a briefly cleared patch as a successful result.

If that did not work

If mist returns with front defrost and fresh air selected, ask BYD to check the actual fresh-air flap position, filter and airflow, and dehumidification. Explain whether it worsens when stopped, with extra passengers or after changing the heat setting; a parked photo of the selected controls can help. Owners have reported recurring SURF misting and suspect partial recirculation, but the handbook does not verify a universal software fault or a heat-level-nine cure. Leave flap wiring connected and ask for diagnosis rather than disconnecting its motor.

Useful next steps

BYD DOLPHIN SURF RHD 07.2024 EN_V0 handbook, PDF pages 139, 140, 141. Checked 13 November 2026.

Open source (BYD UK)
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