Should I start my air conditioning w/re-circulating air then switch to fresh air after car gets cool?

Asked by Aug 13, 2016 at 10:56 AM about the 1995 Honda Civic Coupe

Question type: General

3 Answers

98,365

No, it is always best to use the outside air at first, this removes the stale air that present inside the vehicle and also removes any hydrocarbons that tend to build up in a hot car, then if the air from the vent is still not cold enough you can switch to recirculating the internal air as it cools. I always leave my system on fresh air, in my area it just does not get really hot enough outside to warrant using recirculating air.

1 of 1 people found this helpful.

Thanks. Problem is in my area it sometimes gets very hot & I need to cool things down as quickly as possible. But I never thought about the hydrocarbons. I guess it's a judgement call.

98,365

Then think of it this way, outside air is usually cooler than inside air on a hot day even if it is 120 degrees, so it make sense to pull in the cooler air at start up to flush out the hot as fast as possible.

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