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A/C & Fan: Turn Off or Leave On?

 
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Old 05-11-2009, 07:17 PM
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A/C & Fan: Turn Off or Leave On?

I need a little help with a quandary. I want to add a remote starter to my wife's new car. Having this, quite obviously, would allow us to start the car while walking to it, allowing the a/c to start working a little bit earlier. We both feel that this would come in handy with kids, considering how hot a car's interior can get out here.

The only real problem I have is that my wife is convinced, thanks to her Dad, that she must turn off the ventilation system in her car when she shuts it down. I know that this was important for vehicles made in the 70s and earlier, but this is something that I've only seen 3-4 people do in my 38 years of riding in cars. Last I checked, automotive electrical systems have advanced to the point that they can handle starting a car with the a/c switched on and the fan set to whatever.

Thoughts? Thanks in advance.
 
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Old 05-11-2009, 10:19 PM
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i only shut my ac off when it is winter! my truck has 180,000 miles on it and no problem the ac in my wife's car never gets shut off unless it is winter,it only has a quarter of a million miles on it and it so it is too early to tell if leaving the ac on is a bad thing or not
 
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Old 05-11-2009, 10:24 PM
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I do however shut my ac off a few miles before I get home when the humidity is up so the evaporator can dry out and not start stinking.
 
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Old 05-11-2009, 11:14 PM
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I believe there is a delay relay in there that delays the compressor start up. So it is fine to leave the air on when you shut the car down.
 
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Old 05-12-2009, 08:52 AM
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I leave ours on in the excursion, it has the remote start. We have two fans in the a/c system so im sure you'll be fine.
 
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Old 05-12-2009, 10:55 AM
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Thanks. I got to thinking a little more about this yesterday.

My Bronco is 16 years old with 145,000 miles. The a/c system has never been worked on, and the batteries last as long as they should. I never turn the fan or a/c off (even in winter).

My wife's Santa Fe is 6 years old with 105,000 miles. At 95,000 miles the ventilation panel in the dash had to be replaced because the fan switch was starting to cut out.

I think that teaches the lesson that shutting the a/c and fan off all the time will wear out the switches, resulting in a costly, non-warranty repair.
 
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Old 05-14-2009, 03:27 PM
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Darn those pesky non warrenty items.
 
 
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