The expert took to TikTok to reveal how you can cool down your car in just thirty seconds.

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They explained that there are two different air-intake buttons on your car’s dashboard.

One setting – known as recirculation – will cool down air already inside the car.

A second mode, which he calls fresh air, draws in the air outside the car.

They said: “80% of people do not know how to use the car air conditioner.

“First, open all the windows after getting in the car.

“Turn on the AC switch. Adjust it to the maximum and set the temperature to the lowest.

“Then turn on the outer loop and wait for two minutes.”

The air inside the car will be hotter than the air outside – so opening the windows before switching on the AC draws fresh air in from outside.

But you need to press a button to turn off the car’s recirculation, or else you’ll waste time cooling down hot air inside the car.

The expert said: “Wait for two minutes, then close the windows.

“Change the air outlet mode to internal circulation.

“This is the quickest way to make air conditioning work.”

Drivers on TikTok gave mixed reviews in the comments section.

Some said they’ve been using this trick for years – others report they had no idea about the different modes.

One TikToker said: “Is that not common sense?”

Another commented: “He is right. In most cars the owners manual tells you to do this.”

A third driver said: “Jokes on you, my AC doesn’t even work.”

It comes after a cleaning whizz revealed a free way to get bird poo off your car in seconds with just one wipe.