Question about the heater and A/C

wdkwang · 11-04-2012, 02:40 AM

So it's getting relatively brick out here in NYC at night. For the sake of my gf's comfort, I'd blast the heat at 90F on max to get the car warmed up faster. Problem is that I have test pipes so the smell of gas gets into the cabin and is a little bothersome. I notice every time I press the Recirculation button, it also turns on the A/C. If I turn off the A/C, it also changes the shutter to Fresh Air automatically every time. I don't understand why it does that and seems counterintuitive for the A/C to want to come on to cool the air when I'm trying to heat the cabin up, plus lower my MPG. What gives?

Mandingo · 11-04-2012, 10:01 AM

I find that annoying as well. I don't like it when my car assumes things

I can't find a way around it though, so I've learned to live with it.

DEpointfive0 · 11-04-2012, 03:49 PM

Quote:

Originally Posted by wdkwang

So it's getting relatively brick out here in NYC at night. For the sake of my gf's comfort, I'd blast the heat at 90F on max to get the car warmed up faster. Problem is that I have test pipes so the smell of gas gets into the cabin and is a little bothersome. I notice every time I press the Recirculation button, it also turns on the A/C. If I turn off the A/C, it also changes the shutter to Fresh Air automatically every time. I don't understand why it does that and seems counterintuitive for the A/C to want to come on to cool the air when I'm trying to heat the cabin up, plus lower my MPG. What gives?

OP, I asked the same question:
OEM Nav A/C question

sparky · 11-04-2012, 04:06 PM

There are a few other threads I recall on this too. Let's suffice to say the heat & A/C controls on this car (and my Murano for that matter) are a fail by Nissan.
Someone else speculated that the A/C comes on with recirc to avoid fogging up the windows in such a small cabin. This doesn't explain the Murano though.
I too have learned to live with it and pretty much have to push the A/C off with every change to the controls.

My_third_Z · 11-04-2012, 08:38 PM

It did the same thing in my '03 350z.

11-04-2012, 02:40 AM	#1 (permalink)
wdkwang Track Member Join Date: Nov 2010 Location: N/A Posts: 899 Drives: slidewayz Rep Power: 21	Question about the heater and A/C So it's getting relatively brick out here in NYC at night. For the sake of my gf's comfort, I'd blast the heat at 90F on max to get the car warmed up faster. Problem is that I have test pipes so the smell of gas gets into the cabin and is a little bothersome. I notice every time I press the Recirculation button, it also turns on the A/C. If I turn off the A/C, it also changes the shutter to Fresh Air automatically every time. I don't understand why it does that and seems counterintuitive for the A/C to want to come on to cool the air when I'm trying to heat the cabin up, plus lower my MPG. What gives? __________________ Powerhouse Amuse \| K&N Typhoon Intakes \| MotorDyne ART Pipes \| Borla Catback Exhaust \| B&M Short Shifter \| Intake Ducts \| Ichiba 25mm F/R Spacers \| Carbon Fiber Interior Vinyl Wrap \| Tints \| 10000k HIDs \| Vtak, yo!

11-04-2012, 10:01 AM	#2 (permalink)
Mandingo Track Member Join Date: Nov 2010 Location: Dallas Posts: 625 Drives: '10 370z 6spd Rep Power: 3371	I find that annoying as well. I don't like it when my car assumes things I can't find a way around it though, so I've learned to live with it. __________________ some mods

11-04-2012, 04:06 PM	#4 (permalink)
sparky Track Member Join Date: Jul 2011 Location: Vancouver, BC Posts: 642 Drives: 12 370Z GM AT Rep Power: 15	There are a few other threads I recall on this too. Let's suffice to say the heat & A/C controls on this car (and my Murano for that matter) are a fail by Nissan. Someone else speculated that the A/C comes on with recirc to avoid fogging up the windows in such a small cabin. This doesn't explain the Murano though. I too have learned to live with it and pretty much have to push the A/C off with every change to the controls. __________________ 2012 370Z GM 7AT/JWM LEDs / 3M clear bra / 35% tint / GTR start button / FI CBE SS 18" RES / Momo shift knob / K & N Typhoon / Z1 hood struts / H&R 20mm f/r / illuminated kickplates

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11-04-2012, 08:38 PM	#5 (permalink)
My_third_Z Enthusiast Member Join Date: Feb 2011 Location: Charleston,SC Posts: 312 Drives: Blue 09 370z Rep Power: 14	It did the same thing in my '03 350z.