Hot air coming from vents.

CHC · 08-01-2011, 07:15 PM

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?

11Thumper · 08-01-2011, 07:22 PM

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?

akong51 · 08-01-2011, 07:50 PM

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?

TreeSemdyZee · 08-01-2011, 08:21 PM

Normal.

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

Nick911sc · 08-01-2011, 09:20 PM

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.

hdskull · 08-01-2011, 09:28 PM

Same thing here..

poorazn · 08-01-2011, 10:23 PM

Quote:

Originally Posted by akong51

I experience the same thing with my car. With the a/c off and outside vents open

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!

TreeSemdyZee · 08-01-2011, 10:32 PM

Quote:

Originally Posted by poorazn

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.

CHC · 08-02-2011, 03:15 AM

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!

oleg · 08-02-2011, 04:01 AM

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?

DjSquall · 08-02-2011, 06:20 AM

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

Jeffblue · 08-02-2011, 08:02 AM

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.

TonyD · 08-02-2011, 04:49 PM

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.

TonyD · 08-02-2011, 04:51 PM

Quote:

Originally Posted by Jeffblue

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 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.....

11Thumper · 08-02-2011, 05:00 PM

Quote:

Originally Posted by TonyD

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.

08-01-2011, 07:15 PM	#1 (permalink)
CHC Base Member Join Date: May 2010 Location: Southern California Posts: 5 Drives: 2010 40th 370Z Rep Power: 15	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?

08-01-2011, 07:50 PM	#3 (permalink)
akong51 Base Member Join Date: May 2011 Location: Los Angeles Posts: 52 Drives: 2011 Nissan 370Z Rep Power: 14	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? __________________ 2011 Nissan 370z \| Magnetic Black \| 6MT *GReddy SE \| Swift* Spec-R \| H&R 20mm \| GT-R Ignition Start \| NISMO Carbon Fiber Shift Knob**

08-01-2011, 09:28 PM	#6 (permalink)
hdskull Track Member Join Date: Jun 2009 Location: San Diego Posts: 680 Drives: '10 Black 370Z 6MT Rep Power: 17	Same thing here.. __________________ ^ Kenwood DDX616 \| Polk DB6501 \| Llumar 23% tint \| STi-R Clear Lens SSR Type-F \| F.I. 18" CF \| Stillen Gen 3 \| KW V3

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08-01-2011, 07:22 PM	#2 (permalink)
11Thumper Track Member Join Date: Mar 2011 Location: Bay Area, CA Posts: 754 Drives: '11 370Z, '01 S2k Rep Power: 17	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?

08-01-2011, 08:21 PM	#4 (permalink)
TreeSemdyZee Premium Member Join Date: Dec 2009 Location: Kentuck-IANA Age: 60 Posts: 4,885 Drives: '09 370 & ‘14 Juke Rep Power: 27408	Normal. 350 was the same way. Nissan fails on insulation of heating/cooling dusting.

08-01-2011, 09:20 PM	#5 (permalink)
Nick911sc A True Z Fanatic Join Date: Feb 2009 Location: Long Island, New York Posts: 1,698 Drives: 2010 Nissan GT-R Rep Power: 20	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.

08-02-2011, 03:15 AM	#9 (permalink)
CHC Base Member Join Date: May 2010 Location: Southern California Posts: 5 Drives: 2010 40th 370Z Rep Power: 15	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!

08-02-2011, 04:01 AM	#10 (permalink)
oleg Enthusiast Member Join Date: Dec 2010 Location: Illinois Posts: 321 Drives: 2011 370z 6mt sp Rep Power: 14	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?

08-02-2011, 06:20 AM	#11 (permalink)
DjSquall A True Z Fanatic Join Date: Apr 2010 Location: Tottenham, ON Age: 36 Posts: 1,340 Drives: My first car Rep Power: 22	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

08-02-2011, 08:02 AM	#12 (permalink)
Jeffblue A True Z Fanatic Join Date: Dec 2009 Location: NY Age: 36 Posts: 9,192 Drives: Z32TT & 335xi Coupe Rep Power: 37	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.

08-02-2011, 04:49 PM	#13 (permalink)
TonyD Base Member Join Date: Mar 2011 Location: Boston Posts: 32 Drives: 2010 370Z Roadster Rep Power: 14	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.