Odd Climate Control Problem

[Foster]

2000 carrera cab

My climate control has been acting strange. When the AC is on I can hear the fan running but almost no air comes out. If I hit the snowflake button to turn the AC off, cold air comes blasting out, but of course it soon gets hot. If I hit the snowflake button again the air stops blowing but gets cold.

So the AC is working. The fans are working. But when the AC is on the air is being blocked.

Any ideas?

[juniinc]

sounds like temperature mix flap is not functioning properly.

[perryinva]

There was a post a few months back about someone else having a similar issue and it turned out to be some disintegrating foam/rubber coating on the flap door, which prevented it from sealing and moving correctly.. He noticed small bits of black "stuff" coming out the vents. I tried to search for it but I really can't be sure it was here or Renntech. Unfortunately I can't even recall what the soultion was..hope it doesn't happen to me!! The search engine on this site is so bad that it's hard to get a good response from key words. Maybe someone else will chime in

[Loren]

There was a post a few months back about someone else having a similar issue and it turned out to be some disintegrating foam/rubber coating on the flap door, which prevented it from sealing and moving correctly.. He noticed small bits of black "stuff" coming out the vents. I tried to search for it but I really can't be sure it was here or Renntech. Unfortunately I can't even recall what the soultion was..hope it doesn't happen to me!! The search engine on this site is so bad that it's hard to get a good response from key words. Maybe someone else will chime in

[wwest]

2000 carrera cab

My climate control has been acting strange. When the AC is on I can hear the fan running but almost no air comes out. If I hit the snowflake button to turn the AC off, cold air comes blasting out, but of course it soon gets hot.

If I hit the snowflake button again the air stops blowing but gets cold.

Assuming it takes a matter of minutes, 10-15, from the time you turn on the A/C, the flow gets cold and then stops, the evaporator is icing up.

So the AC is working. The fans are working. But when the AC is on the air is being blocked.

Any ideas?

[perryinva]

Fix for the flap here:

http://www.carboncow.com/pages/porsche/heater_door.htm

General discussion here

http://www.renntech.org/forums/index.php?s...ir++black++mold

[RFM]

Check the A.C. control box for fault codes, the snow flake button is the on/off switch for the compressor. Perhaps there is something wrong with the control unit.

[juniinc]

yup possibility like a temp mix flap command?

[Foster]

Thanks for all the relpys!

I suspect it's the control unit. I was hoping someone knew a trick to reset it.

Can this be fixed/recalibrated, or is it toast?

I looked a little but couldnt find one for sale online for a 2000 carrera. Any tips?

Thanks all!

[Foster]

Problem solved.

I checked the the AC diagnostics to see if the temp sensors and flap commands and positions looked right.

It all looked normal so I figured it had to be the control unit.

I decided to try to move the flaps open and disable them so the AC would work till a control unit came along on ebay.

I crammed my head into the footwell and started poking around when I noticed something that didn't belong there.

A little plastic bag that my newspaper comes in was sucked up against the intake vent. When I pulled it out cold air came blasting out of all the vents.

I spent at least 8 hours searching and reading. Drove around for 2 weeks in 95+ degree heat with no AC. Nearly spent $350 on a control unit. And all I had to do was reach under the dash and pull out a little plastic bag. :wacko:

[john in lb]

Problem solved.

I checked the the AC diagnostics to see if the temp sensors and flap commands and positions looked right.

It all looked normal so I figured it had to be the control unit.

I decided to try to move the flaps open and disable them so the AC would work till a control unit came along on ebay.

I crammed my head into the footwell and started poking around when I noticed something that didn't belong there.

A little plastic bag that my newspaper comes in was sucked up against the intake vent. When I pulled it out cold air came blasting out of all the vents.

I spent at least 8 hours searching and reading. Drove around for 2 weeks in 95+ degree heat with no AC. Nearly spent $350 on a control unit. And all I had to do was reach under the dash and pull out a little plastic bag. :wacko:

I hope you recycled that plastic bag.... :D

[perryinva]

PLastic bag clogging is pretty similar to the control flaps messed up. Right diagnosis, wrong solution!! The best fix is the free easy one!!