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Low speed cooling fan not working?time for a new resistor?

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

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YOUR RESEARCHLow speed cooling fan not working?time for a new resistor?

Leading reported evidence

Fill with red permatex gasket maker

Performed · outcome unconfirmed

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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 performed work without a confirmed outcome
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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

I just used crimp connectors filled with red Permatex gasket maker..

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?
Frequently discussed work

Check relay first

No successful repair reported for this finding.

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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 both fans run at high speed I would check the relay first.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?
Read full discussion summary

Leading evidence: 'Fill with red permatex gasket maker' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'resistor' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check relay first' (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 · 5 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Use crimp connectors

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.

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

I just used crimp connectors filled with red Permatex gasket maker..

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

resistor

Suggestion or failed attempt

No successful repair reported for this finding.

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Identified cause
1
Suspected cause
0
Reported fixes
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.

Discussions that suspect a cause
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.

Suspected cause

More than likely the resistor, but to check if its the relay just replace with another relay.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Check relay first

Suggestion or failed attempt

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.

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 both fans run at high speed I would check the relay first.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Clean debris out of the ac condensers and radiators

Suggestion or failed attempt

No successful repair reported for this finding.

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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.

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

While you are at it,now is a good time to take off the front bumper cover and clean all the debris out of the AC condensers and radiators.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?
Frequently discussed actions (7)

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

Check relay first

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 both fans run at high speed I would check the relay first.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Clean debris out of the ac condensers and radiators

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

While you are at it,now is a good time to take off the front bumper cover and clean all the debris out of the AC condensers and radiators.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Fill with red permatex gasket maker

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

I just used crimp connectors filled with red Permatex gasket maker..

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Replace its the resistor

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

There are 4 fan relays that are exactly the same, just swap them around, if nothing changes, its the resistor.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Replace resistor

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

Both fans do work at high speed, so it looks like I need to replace the resistor for the passenger side fan.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Replace with another relay

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

More than likely the resistor, but to check if its the relay just replace with another relay.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?

Use crimp connectors

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

I just used crimp connectors filled with red Permatex gasket maker..

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?
Reported and suspected causes (1)

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

resistor

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause

More than likely the resistor, but to check if its the relay just replace with another relay.

Original post Read captured discussion
Low speed cooling fan not working?time for a new resistor?
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.

  • 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: 20261027T053112Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

The other day while driving the 996 in traffic, I noticed the coolant temp got a little higher than normal. When I got back to my garage, I turned on the A/C to see if the fans were running on low speed and sure enough, the passenger side fan was not working. Both fans do work at high speed, so it looks like I need to replace the resistor for the passenger side fan. Can someone who has done this before verify the part number for me? I think it is part no. 996-616-101-00. Also, it looks like the new part comes with a plug attached to the end but my research shows that the new resistor needs to be soldered on. Can the new plug simply be plugged in or is soldering required? TIA for any help�

POST 2Original post

If both fans run at high speed I would check the relay first. If good then just solder the new resistor on - easier than getting the whole harness plugged in and routed.

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 9375597

Can a bad relay allow the high speed to work but not the low speed? I thought that this scenario always pointed towards a bad resistor.

POST 5Original post

More than likely the resistor, but to check if its the relay just replace with another relay. There are 4 fan relays that are exactly the same, just swap them around, if nothing changes, its the resistor. There is no plug on the new resistor, you need to splice it in. I just used crimp connectors filled with red Permatex gasket maker.. While you are at it,now is a good time to take off the front bumper cover and clean all the debris out of the AC condensers and radiators.

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