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Ok to start car with air conditoner on?
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m. osborn
Anonymous Poster
yesmrose@yahoo.com
Jul 21, 2008, 11:06 AM
Post #1 of 3
(1371 views)
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Ok to start car with air conditoner on?
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My boyfriend and I have had a longstanding disagreement that I''m hoping to get to the bottom of. He says it hurts the engine (and at the least isn''t good for the car) to have the air conditioner on when the car is started; that you should wait until the car is already started to turn on the air conditioner. Is this true? Recently the engine in our little 2000 Suzuki Esteem has been feeling bumpy for a few minutes when we start the car, whether or not the air conditioner is on, and my boyfriend thinks my habit of starting the car with the air conditioner on has possibly hurt the engine. Thanks!
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DanD
Veteran
/ Moderator
Jul 21, 2008, 12:58 PM
Post #2 of 3
(1364 views)
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Re: Ok to start car with air conditoner on?
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Back in the 70’s or 80’s some of what your boyfriend is saying had some truth to it but not on today’s computerized systems.
Back then when you turned on the AC, you turned the AC on and nothing is going to turn the system off, short of a problem with the system.
Today when you push the button for AC you’re actually putting in a request to a computer; may I have air conditioning?
The computer looks at the inputs from the various sensors and then determines, yes you may or no you may not. Once the computer sees that the engine can handle the load of the AC compressor and that the use of the AC is not going to hurt anything, on it comes. All of this only takes seconds as long as everything is in good working order.
I know this isn’t a very technical explanation but that’s more or less what happens.
I leave my ac switch on when I know it’s going to be hot out when I return to my truck. I hit the remote start 10 minutes before I leave and I’m nice & cool. LOL
Dan.
Canadian "EH"
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flgmtech1
User
Jul 21, 2008, 1:37 PM
Post #3 of 3
(1361 views)
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Re: Ok to start car with air conditoner on?
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All new Gm's that are equipped with "Remote Start" using a Keyless entry transmitter are for the customer comfort in the way of starting the car with the A/C on in the summer to cool down the interior prior to the occupants reaching the car, and or heating the interior in the winter to defrost the windshield and heat up the interior.
Most of Gm's newer cars use pulse width modulated Generators (a/k/a alternators) that prevent issues with voltage use, this coupled with a PCm that monitors the barometric pressure, the vehicles engine coolant temperature and heated oxygen sensors, it can tell many things, like the fact that the enigne has just been started, it is in a cold or hot climate, it is in park and at idle, these are just a small sampling of the systems being monitored on todays vehicles, so No, it does not harm the vehicle to start up with the A/C on.
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