Q: Leaving the AC ON when switching the engine ON and OFF

asked by on

In the old days my father used to tell me that it's highly recommended to turn OFF the AC before switching OFF the car engine. He also told me that when I get into the car I have to wait for 60 sec before turning ON the AC.

However, nowadays I notice that there are lots of people who keep their AC Switch ON at all times; when they start the car, the AC will immediately start and goes OFF only when they switch OFF the engine.

My Camaro is a 2015 RS 3.6 V6 and has a remote start/stop key feature from distance. I use this feature most of the time. However the AC won't start unless I keep the AC switch ON.

My question: Is it ok to keep th AC switch ON at all times? Is it alright to switch the engine ON and OFF while the AC is always ON?

Kindly advise if this has any disadvantages

Thanks,

JC

My car has 16000 miles.
My car has an automatic transmission.

Hello. All of your accessories are computer controlled and leaving them in the On position will not pose any problems. In the old days, cars were not computer controlled and would stall sometimes if you did not let the engine start and run for a minute before the A/C was turned on so the engine could warm up some to stabilize. Newer cars are idle controlled by computer and will idle up to compensate for loads, temperature, or any thing else that may try and load the engine when you start it up. So do not worry about leaving it on. Your remote start can also be used to cool or heat the interior before you get in the car. If you are having trouble with the AC, you may want to bring it to the dealer since the vehicle is still new and likely under warranty. If you would like to have another technician inspect the AC for you, a certified professional from YourMechanic can come to your car’s location to diagnose the AC system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Leaving the AC ON when switching the engine ON and OFF

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What is the problem? No one can tell me

The vehicle idling in park with no A/C does not really require much need for the idle air control valve. Once the vehicle is put in drive, this will put a load on the engine as the A/C will require...

Q: How do turn off the 'horn beep' function on a mopar aftermarket remote start in a 2015 Jeep Grand Cherokee?

If you do not have the publications and manual that came with the system, you may inquire about them at the dealer or look it up online so you have the manual for the system. If this is not a...

Q: What is it when you add antifreeze to your car every few days and your car never run hot

If you have to add more than a cup of coolant in a 6 month time frame from normal evaporation then you have a leak. The coolant leak can be identified as an external or an internal leak. If you...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.