In 15 Seconds
- Used to report a broken or malfunctioning air conditioning unit.
- Common in hotels, rentals, offices, and public transportation.
- Short for 'air conditioning' and understood globally in English.
Meaning
This phrase tells someone that the air conditioning system is broken or not blowing cold air. It is the most common way to complain about being too hot indoors.
Key Examples
3 of 6Checking into a hotel
Excuse me, the AC isn't working in room 402.
The AC isn't working in room 402.
Texting a roommate
Ugh, the AC isn't working again. It's like an oven in here!
The AC isn't working again.
In a meeting room
I'm sorry, but it seems the AC isn't working. Should we move rooms?
It seems the AC isn't working.
Cultural Background
Americans are famous for their love of powerful air conditioning. In many US buildings, the AC is kept so cold that people wear sweaters inside during the summer. Reporting that the AC isn't working is seen as a high-priority issue. Many Europeans are more skeptical of AC, preferring open windows and fans. In older cities like Paris or Rome, many buildings don't have AC at all. If you say 'The AC isn't working,' the response might be slower than in the US. Japan has a 'Cool Biz' campaign where offices set their AC to 28°C (82°F) to save energy. If you say the AC isn't working, they might just tell you it's on the 'Cool Biz' setting. In countries like the UAE or Qatar, AC is a survival tool. A broken AC in the summer is considered an emergency, and repair services are often available 24/7.
Check the Thermostat
Before you say 'The AC isn't working,' check if the temperature is set correctly. Sometimes it's just set too high!
Don't say 'Open the AC'
In English, we 'turn on' or 'switch on' the AC. Saying 'open the AC' is a common mistake for speakers of Romance languages.
In 15 Seconds
- Used to report a broken or malfunctioning air conditioning unit.
- Common in hotels, rentals, offices, and public transportation.
- Short for 'air conditioning' and understood globally in English.
What It Means
The AC isn't working is a straightforward way to say the cooling system failed. In English, AC stands for air conditioning. When you say it isn't working, you mean it is broken. It might be blowing hot air. It might be making a loud noise. Or, it might be completely silent while you sweat. It is a simple, high-frequency phrase for survival in hot climates.
How To Use It
You can use this phrase as a complete sentence. Just walk up to a hotel clerk or a landlord and say it. You can also add I think at the start to sound more polite. For example: I think the AC isn't working in my room. If you want to be more specific, you can say The AC isn't blowing cold air. But usually, the short version is enough to get help.
When To Use It
Use this anytime you feel the indoor temperature rising. It works at a hotel when you first check in. Use it at the office if your colleagues look sweaty. It is perfect for a ride-share like Uber or Lyft. If you are at a friend's house, you might say it as a question. Is the AC working? is a gentle way to hint that it is too hot.
When NOT To Use It
Do not use this for a handheld fan or a simple plug-in fan. For those, just say The fan is broken. Also, don't use it if the machine is off. Check the power button first! It would be embarrassing to complain only to find the remote needs batteries. Avoid using it in very formal speeches unless the room is literally melting.
Cultural Background
In the US and many English-speaking countries, AC is a basic expectation. People often get very grumpy when it fails. In places like Texas or Florida, a broken AC is considered an emergency. There is a whole culture of 'AC repair' memes. People often joke that they 'can't survive' without it. It is a symbol of modern comfort that we often take for granted.
Common Variations
You will hear The air is out or The AC is down. Some people say The unit is busted for a more casual vibe. In the UK or Australia, they might say The air con isn't working. All of these mean the same thing. They all mean you are about to be very, very warm.
Usage Notes
This is a neutral, everyday expression. It is safe to use with bosses, strangers, or friends. The only 'gotcha' is ensuring you are actually referring to an air conditioning unit and not a ventilation fan.
Check the Thermostat
Before you say 'The AC isn't working,' check if the temperature is set correctly. Sometimes it's just set too high!
Don't say 'Open the AC'
In English, we 'turn on' or 'switch on' the AC. Saying 'open the AC' is a common mistake for speakers of Romance languages.
Be Specific
If you want faster help, say 'The AC is blowing warm air' instead of just 'isn't working.' It helps the repairman!
Examples
6Excuse me, the AC isn't working in room 402.
The AC isn't working in room 402.
A polite way to report a maintenance issue to staff.
Ugh, the AC isn't working again. It's like an oven in here!
The AC isn't working again.
Using a simile ('like an oven') adds emphasis to the heat.
I'm sorry, but it seems the AC isn't working. Should we move rooms?
It seems the AC isn't working.
Adding 'it seems' makes the complaint sound less aggressive.
Hey, is the AC working? It's getting a bit stuffy back here.
Is the AC working?
Phrasing it as a question is a polite way to ask the driver to turn it up.
The AC isn't working, so if you see me crying, it's actually just face sweat.
The AC isn't working.
Self-deprecating humor about being hot and sweaty.
I'm calling because my AC isn't working and it's 100 degrees outside.
My AC isn't working.
Stating the external temperature explains the urgency.
Test Yourself
Complete the sentence with the correct form of the verb.
I'm so hot because the AC isn't ________.
We use the present continuous (is + verb-ing) to describe a current state.
Which sentence is the most natural way to complain at a hotel?
Choose the best option:
'Working' is the standard verb for machines in English.
Match the phrase to the situation.
You are in a taxi and it's 35 degrees Celsius.
This is the most likely complaint in a hot taxi.
Fill in the missing line.
Guest: Excuse me, the AC isn't working. Receptionist: ________
This is the standard professional response to a complaint.
🎉 Score: /4
Visual Learning Aids
Common AC Problems
Mechanical
- • Broken fan
- • Leaking water
- • Noisy motor
Electrical
- • No power
- • Blown fuse
- • Bad thermostat
Practice Bank
4 exercisesI'm so hot because the AC isn't ________.
We use the present continuous (is + verb-ing) to describe a current state.
Choose the best option:
'Working' is the standard verb for machines in English.
You are in a taxi and it's 35 degrees Celsius.
This is the most likely complaint in a hot taxi.
Guest: Excuse me, the AC isn't working. Receptionist: ________
This is the standard professional response to a complaint.
🎉 Score: /4
Frequently Asked Questions
5 questionsNo, 'AC' is perfectly fine. However, 'air conditioning' sounds slightly more professional if you are at a very luxury hotel.
Yes, 'The AC is broken' and 'The AC isn't working' mean the same thing. 'Isn't working' is slightly more common for temporary issues.
'Isn't working' focuses on the problem right now. 'Doesn't work' sounds like a permanent fact about the machine.
HVAC stands for Heating, Ventilation, and Air Conditioning. It's the technical term for the whole system.
It is 'an AC' because the letter 'A' starts with a vowel sound ('ay').
Related Phrases
It's stifling in here
similarIt is very hot and there is no fresh air.
The air is out
synonymThe air conditioning is not functioning.
On the fritz
specialized formNot working correctly; having electrical problems.
The AC is blowing hot air
specialized formThe machine is on, but it's not cooling.
