911uk

Dead fresh air fan

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHDead fresh air fan

Leading reported evidence

Replace dead fan in the engine bay

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 · Original poster
A few months ago, I improved the heating of my 1979 SC by replacing the dead fan in the engine bay with a working one, supplied second-hand by one of the excellent readers of this forum.
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Dead fresh air fan

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Leading evidence: 'Replace dead fan in the engine bay' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace dead fan in the engine bay' (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 · 3 captured posts examined · 0 partial discussions

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Use multimeter, i was able

Suggestion or failed attempt

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 · Original poster
Using a multimeter, I was able to determine that the power does seem to be getting through to this connector.
Original post Read captured discussion
Dead fresh air fan

Frequently discussed actions (2)

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

Replace dead fan in the engine bay

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 · Original poster
A few months ago, I improved the heating of my 1979 SC by replacing the dead fan in the engine bay with a working one, supplied second-hand by one of the excellent readers of this forum.
Original post Read captured discussion
Dead fresh air fan

Use multimeter, i was able

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 · Original poster
Using a multimeter, I was able to determine that the power does seem to be getting through to this connector.
Original post Read captured discussion
Dead fresh air 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.

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

911uk: 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

POST 1 / ORIGINAL POSTEROriginal post

A few months ago, I improved the heating of my 1979 SC by replacing the dead fan in the engine bay with a working one, supplied second-hand by one of the excellent readers of this forum. Guess what?! The main fresh air fan now seems to have died. It was a bit intermittent for a while, then there was a worrying electrical burning smell and since then, no ventilation fan. Luckily, it's winter and the heating is still pretty good. But, come summer, I'm going to want ventilation. Is a dead fan the only likely problem? How do I get at this fan? Anyone got a spare working one? Why, when everything else in the car works really well, do things keep dying in the HVAC?! postamble(); Migration info. Legacy thread was 11906

POST 2 / ORIGINAL POSTEROriginal post

No-one answered my original post, but I thought that this follow-up might help someone. Alternatively, if I'm wrong about anything, please do let me know! All of the relevant heating ventilation bits seem to be accessible via the front trunk. Remove the carpet and a protective panel and it's all there. postamble(); The indicated electrical connector seems to be for the fan. There are four pins, one seeming to be earth, while the others are one for each of the three fan speeds. Using a multimeter, I was able to determine that the power does seem to be getting through to this connector. Therefore, a dead fan does indeed seem to be the diagnosis. Migration info. Legacy thread was 12155

POST 3Original post

I wonder whether there may be a Haynes manual for your year of 911. If so, I'm sure it would offer help on your problem. Go to http://www.haynes.co.uk and do a keyword search. Migration info. Legacy thread was 12159

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