Hi,
I have a '22 Spyder with ~12,000 miles on it.
Weather here in SE FL is beautiful and so I turned off the AC the other day and noticed that the ventilation system blows hot air even with temp set to min. For example, ambient temp 72F, air out the vent measured at 111F.
I took the car for a spin early this am to see if the problem recurs- it does.

I just want to be sure that this isn't "normal" before I book yet another service visit.

 

Yes, with the A/C off, ventilation will be warmer than outside temps.

Same reason putting stuff up front gets hot on an extended drive.

 

Ya, not buying it. My money is on a valve/flap to the heater core not operating. There is no way that 72 degree air heats to 111 passing from the intake, through a fan, and into the cabin after a total system dwell time of a second or less.

 

Well the bold is problematic.

I only mentioned that a temp differential is typical after some amount of driving. Think about 20 degrees was measured, again not right off the start.

Good luck and report back

 

I think you guys are saying different things. arobot is saying the air only takes a second or so to pass through the ventilation system from outside into the cabin, so it can't pick up much heat. You seem to be saying it will be warm when the car is warmed up but not right after startup.

 

I have Spyder RS and confirm the same. AC off and air comes through very hot even with temp set to minimum and always has. I guess it doesn't in regular 718. I just assumed it was something to do with bigger rads or something.

So do let me know if there is a fix.

 

Yes, I said that in the post you quoted.

 

The other problem you have got is the title of this thread should be the title of most of the threads on here.

 

Did you try cycling the fan button down until it’s at the lowest setting and then holding it until off appears in the display? That’s supposed to shut off the outside air. I haven’t tried that on my SRS—honestly I run the AC on with the top and windows down mainly because the extra cooling is nice at slow speeds particularly since ventilated seats weren’t an option.

 

Same thing happens in my SRS

 

I have a similar problem to OP in my 4RS, and this is what I do. It seems to mostly resolve the issue. If you put your hand up to the vent, you can tell the air is still slightly warm, but you don't really feel it with the fan off, especially with the windows down, as you'll often have them on a nice day.

I haven't measured the actual temperature, and a 40-degree difference sounds pretty intense, though. It has only been mildly uncomfortably warm when I've noticed it. If it was 40-degrees warmer on a 70-80 degree day, that would be rough.

 

These certainly must have modern variable displacement compressors, why wouldn’t you leave the AC on the entire time??

 

The reason for not running it is that with the top down the car will be attempting to refrigerate the entire world. So even if the compressors are variable they would likely be running at full whack.

 

I’m on the central east coast of Florida and the weather lately has been perfect for top-down driving in my ’24 Boxster GTS 4.0.

With the top down, I typically shut the HVAC system completely off—and in that state, I get zero airflow through the vents. No heat, no bleed-through, nothing.

Top up, I run HVAC in Auto with A/C and Sync on. If outside temps are below ~50°F, I’ll turn the A/C off, but even then I’m not getting any excessive heat out of the vents.

What you’re describing—111°F air with the temp set to minimum and A/C off—doesn’t sound normal. That’s way beyond any residual heat soak or “by design” behavior. Definitely worth getting it checked.

 

I think he is talking about having the temp set to minimum but the fan ON. Yes a solution is to turn the fan off.