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An air conditioner cools through the compression and expansion of gas (usually Freon). The gas is compressed, and gets hot because of the compression. The hot gas is then sent through a coil, where the heat is blown off with a fan (this is the hot air you're getting on the "outside" of the air conditioner). Once the heat has been vented off, the gas moves into another coil, where the gas goes through a small hole into larger tubing, where the gas is allowed to expand again. That expansion causes the gas to cool, and that is once again blown off of the coil.

So, to summarize... freon is compressed into a small tube using a compressor. The compressed gas heats up and is vented outside. The gas then goes through a small aperture into a larger, more spacious tube where it expands rapidly and cools. That cools the coil, and the cold air is blown into the room. The gas then returns to the compressor to repeat the process.

So, the reason that an air conditioner blows hot air outside, is because it's blowing cool air inside.

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A hair dryer blows hot air out.


Why does air conditioner blows only hot air no cold air?

The air conditioner in cars can blow hot and cold air, which is activated by turning the dial. Red means warm or hot, blue means cold.This could also be related to:the temperature blend door being stuck (if a/c compressor kicks-in)A/c system problem - simple as needing recharge to failed compressor)See "Related Questions" below for moreyour AC system needs recharged


Why is it harder to cool the upstairs with an air conditioner?

It is harder to cool the upstairs with an air conditioner because hot air rises, causing the upstairs to be naturally warmer than the downstairs. Additionally, heat gain from the roof and windows in the upstairs area can make it more difficult for the air conditioner to maintain a consistent temperature. Poor insulation and air leakage in the upstairs can also contribute to the difficulty in cooling the space effectively.


Which action would help an air conditioner use less energy on a hot sunny summer day?

Keeping the blinds or curtains closed to prevent the sun from heating up the room and using fans to circulate air more efficiently so the air conditioner doesn't have to work as hard are both ways to help an air conditioner use less energy on a hot sunny summer day.


Why does an air conditioner must cycle on and off to keep the room cooled to a preset temperature?

Seriously? Cold air blows out of the air conditioner when it's on, reducing the temperature of the room. When the temperature in the room reaches some preset value, the air conditioner shuts off to prevent the temperature from dropping any lower. Once the air conditioner is shut off, heat sources within the room including people, appliances, and heat entering through walls and windows causes the temperature in the room to increase. When this happens the air conditioner kicks on again to bring the temperature back down. It ain't rocket science.

Related Questions

What does it mean when a car gets hot but blows cold air?

The Air Conditioner is on


Why your car air conditioner blows cold and then hot air?

Well the main reason why your car blows out cold then hot is because the air conditioner may not be working properly. You should go to the car shop and get it fixed.


Air conditioner on 1998 Chevy Malibu blows hot air?

the system is probably out of coolant.


What does it mean when the air conditioner blows out hot air once in a while?

If the ambient (air) temperature rises and the A/C blows warm air, it probably means that you need to add freon.


Why does your aircondition blows hot air?

Two basic reasons:The air conditioner is brokenThe air control doors that switch from hot to air-conditioning are jammed or broken.


How can I tell if the coils are clogged in my central air conditioner?

Well, you can open it to find out. But mostly, you will know they are not working if the air conditioner blows hot air, or stops working all together.


Why 300zx air conditioner blows hot air?

Possibly needs recharged with refrigerant. You can check low pressure side with a guage.


Does an air conditioner blow out heat or blow out cold air?

An air conditioner blows out heat


You have a1999 ford cougar the aircon blows hot in the summer and cold in the winter?

Gert your air conditioner recharged.


What is a central air conditioner?

Central Air Conditioners are installed into your house to provide cooling air in every room using a duct system. They are very refreshing on a hot day.


Why does the air conditioner blow cold when driving and then blows hot after it is stopped and restarted. it has been charged with freon.the blower works great but blows hot air.?

sounds like you need to replace either the thermostat or the temp control switch


How do you know if you need air conditioner refrigerant in your home?

If your air conditioner blows air but it's not cold air then you probably need freon in your air conditioner