Guys,

This is just a suggestion to those of you having the issue with A/C.

Order the ANTIGRAVITY 60 Ah Lithium battery.
There are No-Negatives that I'm aware of only numerous benefits.

Like, (Emergency-Start) remote feature which is a Big-Feature, Less weigh than the stock battery, Great warranty.

Seriously from the posts I've read some indicate the A/C condition might be Low-Voltage ???
If that's true then the switch to an ANTIGRAVITY Lithium Battery might just correct the occasional A/C condition.

Lastly, I do have one of the ANTIGRAVITY Lithium Batteries and have not had any issue with the Automatic A/C system.
Including being down in Texas and believe me it was Hotttttttttttttt

Good-Luck guys,
Terry

 

Sorry, I can't agree that throwing random fixes/money at a problem without knowing root cause is the right thing to do (unless you just want the lighter battery anyway). I'm an engineer, and that's just not the way to approach fixing something, unless you have no way to determine root cause.

I'll be reporting my dealer experience / answer in the next few weeks.

 

Adrift,

Of course I'm not suggesting for members to throw their money away at guessing.

I'm only offering a solution that might ???
Actually solve the issue if Low-Voltage is the issue from the cars sitting and the batteries running down.

The plus is the Antigravity batteries are a lot lighter in weight, as well as also providing the Emergency start-feature from a completey ran down battery.

Terry

 

Terry, my data point doesn't at all align with the thy that the battery was weak.

 

Agreed. I've been driving the car regularly, plus I use the Charge-O-Mat when the car is going to sit for more than a couple of days. I'm certain my battery was not low when my AC cut out that one time. We had stopped for less than an hour for dinner somewhere and when we left it wouldn't blow cold no matter how we changed the settings.

I would like to have a good excuse to get that battery though! But fixing this probably isn't it.

 

Yeah, mine does that also. So did the 991. Totally unpredictable.

No kidding it is hot in Texas. That’s why we want the AC to work. Now they are going to say it is functioning as designed.

 

That's been a feature in many (or all?) Porsche models for a long time now, but join the crowd of those mystified by this.
Apparently re-parking the wiper blades occasionally improves their performance and life.

 

I just experienced this issue and am glad I'm not the only one. I was just driving my '22 GT4 that I received in December in the sweltering Texas heat, and the AC was not blowing cold air for about 5-10 minutes. I had it set on 75 and auto and then tried max AC to no avail. After I set it to 70 and auto, it then started to blow cold air after a couple of minutes. The car had already been driven about 15 minutes, 30-45 minutes previously before the instant startup and was warmed up.

 

So you experienced this condition on start-up after your previous drive?

 

Correct, I was sitting in the car while idling for a few minutes as well and also have the AG 40 Ah battery.

 

Can't tell if you're joking or serious...

But if it's typical behavior, I'll just call it a quirk and not be concerned about some electrical gremlin.

 

I never joke on these things so as not to mislead.
Try a Google search of "porsche wiper twitch site:rennlist.com" and you'll find quite a few entries across various models talking about the same thing over a period of many years. Change the word from twitch to other things and you'll find even more (wiggle, shimmy, etc). I found a couple also using the term reparking including for a BMW.

 

Readling through this thread just now, and after my third encounter with the "no AC gremlin" this morning, I think it's software.
Since it appears to only happen on start-up, I suspect the "wake up" sequence, when you turn the ignition on, occasionally does NOT activate the AC compressor.
For those of us using Auto AC, the fan still works, but the compressor does not. So, no cold air.
A restart of the engine and the compressor comes on. I don't think the AC is the culprit. I think it's just not getting the proper "signal" to activate during the start-up sequence.

 

That'd be surprising since mine started working without a restart.

 

I agree it is some control logic, not an inherent problem with the AC/compressor. If so, it would behave more consistently in terms "getting cold after 2 minutes or some such". It is some (erroneous) trigger logic which is telling the compressor not to engage, IMO.