Best Answer

There are two reasons. First the engine is running faster. The AC works by compressing the coolant gas (which heats it up), letting it cool outside the car, then letting it expand (which makes it cool) and letting it absorb heat from inside the car. The compression of the gas takes a lot of force, and that force is coming from your engine itself. Running the engine at a higher RPM gives more available energy to push that "heat cycle" along. The second reason is this: The coolent, once it is compressed and hot, must give up it's heat to the outside air. (There is nowhere else to give it!) The coolent goes through coils to help this, but it's just like any other hot object--it will cool faster if there is air blowing over it. The motion of the car helps provide this aitflow. This is why you AC works best when the car is running. It will work even better when the air is below zero--although you probably won't need it then. :)

User Avatar

Wiki User

โˆ™ 2004-07-01 13:33:49
This answer is:
User Avatar
Study guides

What is the purpose of a crankcase heater on a compressor

What kind of head pressure would you experience if the condenser fan motor became inoperative

What are the three letters on a compressor terminal block

What type of air conditioning coolant is used for a 1995 mercury sable

See all cards
14 Reviews

Add your answer:

Earn +20 pts
Q: Why is the air conditioner cooler while driving?
Write your answer...
Still have questions?
magnify glass
Related questions

Why does your Ford F150 air conditioner blow hot air while driving but air is cold while idling?

Do you have the recycle air button turned off? If you do you would be sucking in hot air when you are moving but when you stop the outside air stops flowing into the air conditioner and it gets a chance to get cooler air from inside the cab and cool it more. Make sure your recycle button is lit on the dash. This closes off the outside air and just recycles the cooler air from inside the cab.

Does using an automobile air conditioner while driving increase fuel consumption?


Why do they call it an air conditioner and not an air cooler?

Because in air conditioner keeps the air at a certain condition depending on your preference. An air conditioner can both cool and heat the air.

Why would a pt cruiser start to stall when the air conditioner is turned on while driving?

Bc is not enough air in the intake....

Is it OK use both air conditioner and evaporative cooler at the same time?

why wouldn't it be?

What is diff between air cooler and air conditioner?

An "air cooler" or "evaporative cooler" cools air by evaporating water. The evaporation process is endothermic and therefore the temperature of the air drops. However, the relative humidity level of the air goes up. This is a common method of cooling air in very dry climates. An air conditioner cools air through a heat exchanger and does not increase the relative humidity of the air.

Can you put ice in a portable air conditioner?

No, you can not put ice into a portable air conditioner. I think you are actually referring to a portable air cooler, in which case, you can put ice into the water chamber.

Does Coleman make a evaporative cooler?

Coleman does make a portable 12v evaporative air conditioner. They do not make a picnic cooler that does this however.

What Impacts of Air conditioner to mankind?

It has made man cooler during summer. It has the ability to cool the air, therefore making man kind cooler when using an a/c.

Why are there water droplets form on the window of an air-conditioner bus?

The interior of the bus is cooler than outside the bus because of the air conditioner. Water vapour outside in the air touches the cooler surface of the window of the bus and condenses to form water droplets on the window.

How do you choose an evaporative cooler?

To choose an evaporative cooler, determine the size of the cooler needed, the services of the evaporative cooler, and the correct type of cooler. Consider the accessories required and compare it with a traditional air conditioner.

Why would a fan runs while you are driving?

There are 2 fans that would be running while you are driving and that is normal... the compressor fan if you have the air conditioner running and the radiator fan runs to help keep the radiator cool while the engine is on.

People also asked