A sign-off-per-item method works well for cooling verification in hot markets: procurement confirms AC capacity for the exact configuration, the technical team confirms engine, motor and battery cooling, and the delivery side confirms idle, congested-traffic and full-load conditions. The hot-climate verification must cover AC, powertrain and battery cooling, and observe fault records under idle, congested-traffic and full-load conditions. Add AC capacity for the exact configuration to the batch checklist, keep the original materials for engine, motor and battery cooling, and re-verify after any change to idle, congested-traffic and full-load conditions.
For the relevant fields, follow What high-temperature features should Middle East buyers check before importing Chinese cars?. The hot-climate AC and cooling check holds only for the configuration and VIN tested; re-verify after any change in model year, software or batch.