Highway code rule means drivers risk £5k fine for not pressing button in warm weather
A specific edict states motorists must keep their vehicles well ventilated as temperatures rise
Motorists across the UK are being warned that failing to properly ventilate their vehicles during warm weather could put them at risk of hefty fines and penalty points. While using the air conditioning button to cool down the car uses fuel, drivers have been warned that failure to utilise the function could see them hit with a hefty fine.
That's because, according to Rule 237 of the Highway Code, drivers must ensure their vehicles remain well-ventilated to avoid drowsiness and maintain full control at all times. The rule specifically covers driving in hot weather conditions and states that adequate ventilation should always be maintained.
While you might want to keep your air conditioning use to a minimum to preserve fuel and save money, you could find yourself in trouble. Kwik Fit estimates turning on your air con can increase fuel usage by as much as 10 per cent and the effects are particularly noticeable on short journeys.
But failure to keep your car well ventilates when temperatures are high can be considered as careless driving if it results in a lack of concentration or contributes to an accident.
Car valuation experts at BigWantsYourCar.com said: "Breaking Rule 237 could result in an on-the-spot fine if you're judged to be driving carelessly or are involved in a collision due to poor ventilation.
"An overheated vehicle can quickly lead to driver fatigue, creating a potentially dangerous situation behind the wheel.'
Drivers are being reminded that maintaining a comfortable internal temperature is not just about comfort, it also directly affects road safety.
A hot and stuffy vehicle interior can reduce alertness, slow reaction times, and significantly increase the risk of making mistakes.
The expert went on: 'Drivers are legally required to remain in full control of their vehicle at all times.
"During hot weather, failing to keep your vehicle adequately ventilated could result in impaired focus and drowsiness, both of which can be considered contributing factors to careless or even dangerous driving."
In less severe cases, this could lead to fines of up to £1,000 and three penalty points.
They added: "However, if a lack of ventilation is linked to a serious accident resulting in injury, the consequences can be far more severe, with fines reaching up to £5,000, nine penalty points, or even a driving ban.
'Good ventilation is essential for safe driving. Without adequate airflow, car interiors can overheat rapidly, leading to fatigue and reduced awareness.
"Opening a window or using air-con can make a significant difference to your concentration levels on longer journeys.'
With warmer weather becoming more frequent, drivers are being urged to take preventative measures to avoid unintentionally breaking the law and to prioritise their own wellbeing and that of other road users.
Rule 237 of the UK Highway Code deals with driving in adverse weather conditions, including hot weather, and also advises drivers to be aware that road surfaces might become soft or slippery.
It also states that if dazzled by bright sunlight, to slow down or stop if necessary.
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