Porsche Club GB

Rear fan

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHRear fan

Leading reported evidence

Test sensor

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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
I guess you could hot wire a supply to the fan motor, but that wouldn't test the sensor.
Original post Read captured discussion
Rear fan

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Leading evidence: 'Test sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test sensor' (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.

Read captured replies

1 matching discussions · 5 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.

Test sensor

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
I guess you could hot wire a supply to the fan motor, but that wouldn't test the sensor.
Original post Read captured discussion
Rear fan

Coverage and how to read this overview

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.

5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Club GB: 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Please can anyone tell me when the rear fan under the spoiler operates and if there is a quick way of testing it. Since owning the car, I've never noticed this thing operating. The front ones operate when hot or when air con is on, but cant say I've noticed the rear one operating. I dont have any cooling issues, just for my own information want to make sure it operates when needed. Car is 2000 C4 cabrio tip Cheers Dave.

POST 2Original post

It's all here: http://www.porscheclubgbforum.com/tm.asp?m=330170 On my C2 the engine compartment fan hardly ever came on. On the Turbo it's a common occurrence.

POST 3 / ORIGINAL POSTEROriginal post

Hi Richard, Many thanks. Do you now if there is anyway to force the fan to run to check all is capable of operating? Cheers Dave.

POST 4Original post

Only with a Porsche tester, I'm afraid. I guess you could hot wire a supply to the fan motor, but that wouldn't test the sensor. If there was a problem, you would get a flashing light in the temperature gauge, so I don't think you should worry.

POST 5 / ORIGINAL POSTEROriginal post

No problem, thank you so much once again. Dave.

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