BHMav8r

2005 997.1

Little bits of black foam coming out of the HVAC vents top and middle. Not sure about the footwell ones. Sizes vary from small to about 1/4" square.

Anybody else?

I'm guessing this is deterioration of some conduit/duct lining and it will wear itself out eventually. Don't really like it when it blows this crap all over my shirt.

Car is not garaged and it can be quite hot here in the south. First owner was in Tampa, FL.

TIA

ADias

Yes, disintegrating foam. Foam is a terrible material but all car makers use it. It survives the warranty period but disintegrates afterwards.

Drewski_Robert

2006 997 C2

+1 on the little bits coming out of the vents. Not often but have noticed in mine and my buddy's 99 996 C2 as well.

vitman

It makes a real mess but it stops after a year or so and the AC keeps working. A bit annoying but it does take care of itself with time.

ADias

Except that... the insulation the foam was providing is gone and rattling increases due to lack of cushioning foam between moving plastic flaps in the AC/Vent piping. A better material like stable soft rubber would be better.

Jason F

Same thing is happening in my RS6... Premature deterioration due to excessive heat exposure I'm guessing. It's an annoyance for sure.

BHMav8r

Thanks. At least its not just me, or serious, or long lived.
I was thinking what this would look like as you are trying to sell your car. The potential buyer turns on the HVAC and gets covered in crappy foam confetti. Ha Ha Ha Ughmmn.

dasael

Mine has been doing it for last 2 years, I only drive it 1K per year but it seems like never ending, also when this foam flies out, it stains the carpet since it comes out very sticky, 8(

2006 C2, 42K

nk215

The blend doors are not solid plastic doors. They have large holes in them and foam on both sides.

bad blend doors





Here's the new one



To do a complete fix, the dash needs to come out.

When the foam on the edges are gone. It'll rattle.

BHMav8r

Wonderful.

BHMav8r

So how will this affect the HVAC?
More or less heat?
More or less AC?
Less directional control? Footwell - windscreen?

nk215

It affects both heat and cold. You won't be able to precisely control temperature. For example in a hot day, you set ac temp to 65F and the vent air temp is only 70F but it still cold, just not cold enough. The same for heat, you may set the temp to 78 and only gets to 75 etc.

Practically, the only change you may notice is that the fan speed won't change much in auto setting.

BHMav8r

hanks for the info. Much appreciated.

Michaelc

Same problem and it happened in my 993 as well. If it makes anyone feel better it happened in my Toyota Tundra and my Lexus GX470. Porsche is not alone in this one.