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climate control not blowing hot air

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHclimate control not blowing hot air

Leading reported evidence

Use recirc button

Suggestion or failed attempt

No successful repair reported for this finding.

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Unsuccessful attempts
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Discussions
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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.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Then try heating up again and use the recirc button.

Original post Read captured discussion
climate control not blowing hot air
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Leading evidence: 'Use recirc button' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use recirc button' (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.

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1 matching discussions · 4 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Use recirc button

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Then try heating up again and use the recirc button.

Original post Read captured discussion
climate control not blowing hot air
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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.

4 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: 20261027T025149Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Recently driving in cold weather I noticed even with the climate control set to high and engine warmed up to the 180 mark, the interior vents blow only lukewarm. Is this common? As far as I can tell this car has no cooling issues, no leaks. This summer one of the radiator fan resistors failed, but that is it. 99 c4 Tiptronic 996 c4 narrow body on Dyno wheels for winter use. 93k miles and going strong.

POST 2Original post

Have you looked at the blend door/missing foam threads? If not, start there. GLWS.

POST 3Original post

If you want to check if it is the HVAC unit blend doors, pop the pollen filter out and cover it with a plastic bag and reinstall. That will prevent outside cold air getting into the HVAC system. Then try heating up again and use the recirc button.

POST 4 / ORIGINAL POSTEROriginal post

Thanks guys. I will try blocking the cabin filter and see if that warms things up. In the meantime, I will search for a blend door fix.

This is a source reference. Confirm exact model applicability in the original material.