[autobahn]

Hey everyone -



Anyone else had A/C performance issues with their car?

For the longest time on hot days here in Texas I've felt the car doesn't adequately cool the interior.


Now, the last 2 weeks or so, I think the A/C has been freezing up (fan turned on high, slowly and slowly less air comes out the vents until it's barely a trickle, turning the A/C off for a minute solves the problem)


I also have been noticing that the passenger-side vents are blowing air warmer than the driver side vents.


Car is a non-dual zone system.

 

[JakiChan]

It really sounds like you should visit your dealer.

 

[Sails Call]

Low on freon

 

[Yipekiye]

This happened to me on the really long drive back from the PEC to Arkansas. It was a really hot day and it was in the middle of an 8 hour trip. I had the same symptoms as you. I think the AC is freezing up in those situations. Turning the AC off for 10 minutes helped, then after more experimentation, turning off the cooled seats also mitigated it for some reason, which really doesn’t make much sense. I have never had the problem since, mostly because I would rarely drive the car that long without stopping. If your dealer finds a problem, I would like to know the solution, just so that it never comes up again.

 

[Naptown]

If it's the same as home AC, the coil freezes when the refrigerant is low (a leak) or when the return air flow is limited.

 

[jt4006]

autobahn, I've noticed the same problem. I have the base A/C and on hot days (30C+) it seems I have to set it on most cold and a relatively high fan speed to get the desired effect. I'm thinking I'll take it to the dealer to get it checked.

 

[Barryng]

I am not sure if this applies or is accurate but might be worth checking with the dealer. Most frequently a frozen evaporator results from an insufficient refrigerant charge or (much less frequently) a problem with the expansion valve (usually all mechanical). I understand, but do not know for sure, the equivalent of an expansion valve in our cars (and most recent vehicles) is controlled by the computer. A recent post in another thread in this forum discussed a problem where the evaporator was icing up in unusually hot/humid conditions. The post stated Porsche had a firmware/software update to address this problem. You might want to explore this with your dealer.

 

[GregW]

Here in Adelaide the summer days can get to well over 40°C (104°F) and I've never had an issue with the A/C. We do have dry heat though.