8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAir con still having a problem after repair...
Leading reported evidence
Check the temp sensor is correct
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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Read evidence and context
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Leading evidence: 'Check the temp sensor is correct' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check amount of coolant' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Install copper-made wind box, not the original aluminum wind box
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Performed · outcome unconfirmed · Original poster
The reason we think is that he installed a copper-made wind box, not the original aluminum wind box.
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Suggestion · Original poster
I don't know why this is done and now he couldn't check the amount of coolant that was put into it...
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Suggestion · Original poster
If so, yes, both were replaced 10K and 20K miles ago.
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Suggestion · Original poster
So he retrieved the coolant, instead of using the automatic coolant filler, he refilled it from a more conventional coolant tank...
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all,
Want to get some advices here.
The car is 2002 996 turbo, but the AC system is the same as regular 996, I think. The wind box, recycle-air motor, the dry canister, the expansion valve, the control panel the compressor all have been replaced and coolant filled to spec.
The aircon works great and normal only in the first 30-40 minutes. But then after that the air is only moderately cool and the recycle-air motor would stop working (meaning that you can switch btwn indoor and outdoor air inlet) and the fan speed becomes slow.
If you leave the car off for a couple of hours, it would just be normal again and 30-40 mins later, the same thing happens again, like the efficiency is way down, but not completely off.
Any suggestions? Thanks!
You may have checked this, but make sure your radiator fans are working when AC is energized.
Compressor may be shutting down due to high head pressure.
Do you mean the aux fans? If so, yes, both were replaced 10K and 20K miles ago. They're working.
Over the weekend, took the car to the garage again. Here's what he thought happened, the wind box was icing up (the fins were literally clogged with ice/frost), and so that explains the apparently reduced fan output. This could also explain why the air remains cool even long afterI switched off the "cold" button.
The reason we think is that he installed a copper-made wind box, not the original aluminum wind box. This was done so that no future leaks would happen. He believes the copper version is more leak-resistent. He's admitted doing this to 964 and other older models and they work fine, but not on the 996 model. So there may be a compatibility issue, I guess, between the compressor and the wind box.
So he retrieved the coolant, instead of using the automatic coolant filler, he refilled it from a more conventional coolant tank... I don't know why this is done and now he couldn't check the amount of coolant that was put into it... And it's not icing up probably because of lower coolant level.
Well... He believes that solves it without having to re-install the wind box (which I think is a messy job he's avoiding...) I'm just going to see if this still happens after extended drive.
Any comments?
Thanks. And if there's more I'll report back!
Huh? Explain what is a "wind box". What is a copper-made wind box? Is coolant actually freon refrigerant? What is a automatic coolant filler? Refilled from a conventional coolant tank? This is so confusing I'm just shaking my head back and forth. I don't understand what you are talking about.
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