OWNER ANSWER
BYD DOLPHIN air conditioning not cooling or heating properly
If your DOLPHIN is not heating or cooling, check its normal cabin controls while parked before troubleshooting the app. Open the vents and compare the selected temperature, airflow and actual output; for misting, use front demist to restore visibility first.
- Park and power the car on normally. Safety note: Obscured glass makes driving unsafe: stay stopped until you can see clearly. Switch off for smoke, a burning smell or repeated electrical/high-voltage warnings, and leave refrigerant or high-voltage climate work to a qualified repairer.
- Check that climate control is on and the air outlets are open.
- Choose a clear target temperature and fan setting.
- Clear loose obstructions from the visible air intake and cabin outlets.
- Compare airflow and temperature at the vents.
What the result tells you
Strong airflow at the wrong temperature is different from weak airflow at every vent. If cabin controls work but remote climate fails, check the app, connectivity and current vehicle-state or battery refusal message. Front demisting and rear-window or mirror heating are separate functions.
For misting, select the matching front-windscreen defrost control and return to fresh air after initial heating. Keep the intake and outlets clear. The DOLPHIN front-defrost mode sends air to the windscreen and side windows and switches A/C on; ventilation alone is not active cooling.
If that did not work
For weak airflow, ask a BYD repairer to check the intake, cabin filter, blower and distribution path. For persistent incorrect temperature, warnings, unusual noise, leaks or repeated shutdown, ask for climate-system diagnosis. If demisting cannot keep the glass clear, have airflow, dehumidification and possible water ingress checked.
What to note down if you need support: outside and selected temperatures, fan/airflow mode, battery level, warnings, whether all vents or one side are affected, and whether cabin or only app control fails. A parked photo of settings can help.
Related links
Source: DOLPHIN handbook — DOLPHIN RHD 7.2025 EN_V2, separate from SURF; PDF pages 155–158. Checked 22 October 2026.