Porsche Club GB

Radiator Fans Coming On

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHRadiator Fans Coming On

Leading reported evidence

Replace sides

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed
Even though only one had failed they replaced both sides.
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Radiator Fans Coming On

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

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1 matching discussions · 3 captured posts examined · 0 partial discussions

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Run on low speed

Suggestion or failed attempt

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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

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Suggestion
If a fan doesn't run on low speed, it is usually a failure of the ballast resistor which controls the speed when on low.
Original post Read captured discussion
Radiator Fans Coming On

Frequently discussed actions (2)

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Replace sides

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed
Even though only one had failed they replaced both sides.
Original post Read captured discussion
Radiator Fans Coming On

Run on low speed

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
If a fan doesn't run on low speed, it is usually a failure of the ballast resistor which controls the speed when on low.
Original post Read captured discussion
Radiator Fans Coming On

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.

3 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: 20261027T003124Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, Quick question concerning 996 radiator fans - should they come on and off together on both sides at the same time or are they sequential in any way depending on temperatures? Drivers side popped on today when parking, but passenger side was definitely not. No sign of engine temperature rising higher than normal though but I admit i had not been in any significant traffic prior to stopping. Just wondering if it time to see garage... Thanks, Steve

POST 2Original post

They should both come on at the same time. Either both on low speed, or both on high speed. A bit more detail here: http://www.porscheclubgbforum.com/tm.asp?m=330170 If a fan doesn't run on low speed, it is usually a failure of the ballast resistor which controls the speed when on low.

POST 3Original post

Hi, I had this on mine a while back; again with the passenger side not working. When I looked under the car the ballast resister looked very corroded. I did not have any noticeable temperature problems though and mine both still worked on high speed. I got mine fixed under warranty. Even though only one had failed they replaced both sides. Good luck getting them fixed...

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