Hot air coming from vents.
 

After driving the car and then starting up again I'm getting hot air coming from the vents, even when the weather is a lot cooler outside. I have to turn on the A/C and then turn the A/C back off, in which case the air coming from the vents is about the same as the outside. I do have the vents set with air coming from the outside. Is this normal or is it a trip to the dealer?

I've noticed the same thing. Also seemed more humid inside the car than outside even with fresh air coming in. Seems to be getting better though.

How long have you had the car?

I experience the same thing with my car. With the a/c off and outside vents open, I expect the air to be similar to outside conditions, not HOT air. I just chalked it up as "normal" for this car. Am I wrong?

Normal.

350 was the same way. Nissan fails on insulation of heating/cooling dusting.

Driving my car this past weekend whenever I would get back in and start it up I would be melted by the vents. So I'd say this is normal.

Same thing here..

outside air circ is kind of silly in this car, the air is always too warm. Also, you cant put it on re-circulate without the A/C on!

Not a bad idea. I can't believe how many times I see a car going down the road in the middle of winter with their windows completely fogged up because they don't know to turn on the A/C or go to outside air.
Kentucky drivers FTL.

Thanks for all the replies. Well, it sounds like this is a normal condition. I have about 5000 miles on the car and it is just over a year old. I've started using it as a daily driver for about 5 months now. Glad to know I won't have to take it the dealer at least. Thanks again!

I'm guessing it's too help cool the engine, kind of like how you should run hot air in your car if it's really hot?

After running the a/c, and shutting off the car, the heat pump (ac) let's the hot refrigerant from the condenser into the evaporator in order to dry it up from all the moisture that's in there. Really that's a good thing, because the conditions in an air conditioners drain pan (still water,etc) can be perfect for various bacteria to breed.

That's why you get that bit of hot air at the start up again

just turn on recirculate. if you don't crank the AC, you wont use that much extra gas by having recirculate on. people blow out of proportion how much gas mileage is affected by AC. if you're in your 30k+ sports car, and your legs are hot, because the vents, don't try and save money by not turning on the AC, at least on recirculate.

I was just going to write this topic! I understand the heat from the firewall and trans tunnel but there is no excuse for hot air coming from the vents. The vents should just duct outside fresh air into the cabin like a normal car. It sucks driving a roadster with hot feet and warm air blowing in your face instead of nice fresh air. The roadster actually does TOO good a job of deflecting wind. You get zero air flow highway cruising, just a little down the back of your neck, nothing in your face or body. I need a small window like they had on cars in the 70's right near the mirror to angle air into the cabin.

I dunno... when I turn on the A/C on my Tacoma truck the thing lurches forward like I dropped anchor. Its noticeably down on power when the A/C is cranked on a hot day. Seems silly to use the A/C on a roadster just to keep the feet cool.....

Save gas, drive naked. :tup:

"wings".
And thank you for reminding me of my age. :mad:

Issue shows up on economy cars as well. My 240sx, celica, and prelude had the similar issue as well. Something about air being heated up by the engine.

Air conditioned air goes through the engine bay through the compressor. Yes, the air comes in from outside, but it has to pass through there. If the compressor and condensor aren't doing anything, it just gets heated by the engine bay and flows into the cabin.

Nissan and Infiniti have the worst HVAC systems I have ever experienced.
If the outside air temp is 60 degrees and you want some nice cool air coming in the cabin and have the system set on vent, the air is still too warm. I have to run the A/C most of the time to keep from feeling like I am suffocating. And it's also retarded that you cannot turn on the recirculate without the A/C coming on. When I am behind a stinking oil burner or smoke bellowing diesel truck and don't want to breathe the fumes I turn on the recirc, I'd like the ability to turn the A/C on or off. I have never had another car with these issues so it seems they need to go back to the drawing board.

all good comments. I've found down here in Texas that the auto climate settings
can be hard to get where you want it. I can set it to auto and on a real hot day
after the cabin cools down most times i have to turn the control knob to 78 or so to get the fan to turn down.. but it still beats baking in your car!!!!!!