Drivers warned of air conditioning myths over fears it could hammer fuel economy

There are fears, however, that motorists could be risking their health when at the wheel, with air con myths potentially affecting drivers.

The UK Health Security Agency said the hottest years on record have all occurred since 2002, with 2022 seeing temperatures soar past 40 degrees.

​According to the British Nutrition Foundation, a drop in body weight of just two per cent in water can lead to impaired cognitive responses, with headaches and fatigue likely.

Using air conditioning and lowering the cabin temperature of the car can help reduce the effects of fatigue and tiredness for the driver and passengers.

When at the wheel, motorists will normally turn on air conditioning for a short amount of time to avoid affecting the fuel economy.

The Energy Trust found that motorists can expect to see up to a five per cent drop in fuel efficiency when driving with the air con on.

​However, other factors, like under-inflated tyres, a packed boot and a bike rack or roof box, can have a similar or greater impact on fuel economy.

Another common myth that drivers often believe is that the air con should not be switched on when starting the car.

Popular car manufacturer Skoda state that modern car electronics are more resilient than in previous years and can deal with more intensive strain than older vehicles.

According to the automotive brand: “With modern ignition systems, stop-start technology and electric vehicles, there’s no cause for concern when starting a car with the air-con switched on.”

With newer and more modern vehicles, drivers can make use of designated mobile apps to pre-cool their cars before entering in warmer weather.

Another misconception is that air con can only be used during the summer, but experts are urging drivers to use it during winter to prevent the build-up of fungus in the air conditioning and can help with dehumidifying.

Skoda added: “Regularly using the air conditioning system has other benefits, specifically it keeps the system in a good physical condition.

“Air conditioning systems are sealed systems, with air-con compressors and seals lubricated by oil.

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“Failing to switch on the air-con means no lubrication, which can cause the compressor to be less efficient and the seals to dry out.”