Motorists across the UK could be wasting hundreds of pounds in fuel each year by overlooking a simple button on their car's air conditioning system. Experts reveal this little-known feature could be the key to staying cool while saving money at the pump.
The Magic Recirculation Button
Hidden in plain sight on most dashboard AC controls, the recirculation button (usually marked with a car icon and looping arrow) stops your vehicle from constantly pulling in hot outside air. When activated, it recools already chilled cabin air instead.
Why This Saves Fuel
By not forcing your AC system to constantly cool fresh hot air from outside, the compressor works less hard. This reduces engine load, directly improving fuel efficiency – especially important during summer heatwaves when AC use peaks.
When NOT to Use It
- In humid conditions (can cause window fogging)
- During short journeys (fresh air is healthier)
- When carrying multiple passengers (air becomes stale faster)
Motoring expert James Carter explains: "Most drivers either don't notice this button or use it incorrectly. Used strategically, it can improve fuel efficiency by up to 8% in stop-start traffic."
Bonus Cooling Tips
- Park in shade whenever possible
- Use sunshades to reduce cabin heat buildup
- Open windows briefly before driving to vent hot air
- Service your AC system annually
With fuel prices remaining high and summer temperatures rising, this simple trick could put money back in drivers' pockets while keeping journeys comfortable.
