A Spanish mechanic urges drivers to briefly lower car windows before activating air conditioning. This simple step can reduce cabin heat and improve safety. Experts link high interior temperatures to increased accident risk.
In Spain, as summer temperatures soar, a practical warning from mechanic Juan José is gaining attention among drivers. He advises that before switching on a car’s air conditioning, motorists should keep the windows lowered for a few seconds. This approach, he explains, allows the trapped hot air to escape, making the cooling system work more efficiently and improving comfort inside the vehicle.
Many drivers, especially after parking under the sun, tend to close all windows and immediately activate the air conditioning. According to Juan José, this common habit forces the system to cool air that can exceed 60°C inside the cabin, particularly in vehicles with dark interiors or limited ventilation. The result is slower cooling and unnecessary strain on the car’s climate control.
By briefly ventilating the cabin, the hottest air is expelled, and the temperature inside drops more quickly once the windows are closed and the air conditioning is running. This not only speeds up the cooling process but also reduces the workload on the system, potentially extending its lifespan and lowering energy consumption.
There is also a health consideration. Extreme heat inside a parked car can cause plastics, upholstery, and other materials to release volatile compounds. While occasional exposure is not considered a major health risk, refreshing the air before driving is a straightforward way to improve the in-car environment, especially during prolonged heatwaves.
Beyond comfort, the issue has a direct impact on road safety. Data from Euromaster indicate that driving with interior temperatures above 35°C can increase the risk of accidents by up to 25%. High heat impairs concentration, accelerates fatigue, and slows driver reaction times. For this reason, specialists recommend maintaining a cabin temperature around 22°C, which balances comfort without creating a sharp contrast with outdoor conditions.
Spain’s focus on road safety has intensified in recent years, with authorities introducing new measures to address risks linked to extreme weather and heavy travel periods. For example, during the summer travel surge, the country’s traffic authority implemented mandatory V-16 beacons and launched a dedicated hotline for accident victims, as detailed in recent coverage of Spain’s summer traffic operation.
With heatwaves becoming more frequent, the advice from mechanics like Juan José is increasingly relevant. Simple steps—such as ventilating the car before using air conditioning—can make a measurable difference in both comfort and safety for drivers across Spain. As the country adapts to changing climate patterns, practical guidance on everyday habits is proving just as important as regulatory changes in keeping roads safer.
For context, Spain regularly experiences some of the highest summer temperatures in Europe, with many regions seeing prolonged periods above 35°C. The combination of urban heat, dense traffic, and long journeys makes effective climate control inside vehicles a matter of both comfort and public safety. Authorities continue to monitor the impact of heat on road incidents, and practical advice from professionals remains a key part of the national conversation on safe driving.
