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Question: Rear Window Defogger / Defroster Lines

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

Discussion summary

YOUR RESEARCHQuestion: Rear Window Defogger / Defroster Lines

Leading reported evidence

Check lines carefully

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Suggestion · Original poster

I will check the lines carefully to see if there are any breaks or scratches in the element.

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Question: Rear Window Defogger / Defroster Lines
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Leading evidence: 'Check lines carefully' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check lines carefully' (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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Inspect window and see

Suggestion or failed attempt

No successful repair reported for this finding.

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

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Suggestion

If you inspect the window and see that the lines are cut/scratched, you can repair them.

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Question: Rear Window Defogger / Defroster Lines
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.

Check lines carefully

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

I will check the lines carefully to see if there are any breaks or scratches in the element.

Original post Read captured discussion
Question: Rear Window Defogger / Defroster Lines

Inspect window and see

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 you inspect the window and see that the lines are cut/scratched, you can repair them.

Original post Read captured discussion
Question: Rear Window Defogger / Defroster Lines
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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.

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

  • Rennlist: 1 discussions

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1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

Problem solved.

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NEARBY ACTION · LINK UNVERIFIED

I will check the lines carefully to see if there are any breaks or scratches in the element.

Nearby source post

Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hey folks, I have a 2004 996 coupe. During heavy rain, I noticed the rear defogger / defroster working, however, maybe 3 or 4 lines work properly. Mileage is 53,000km / 33,000 miles. The rear defogger light stays on as it should until about 10 - 12 minutes (I forget exactly.) What can be the problem? Anybody have this issue? Thanks!

POST 2Original post

Scratches on the inside of the back window can damage the defroster grid. If your windows were tinted, or if tint was removed, it's easy to cut the individual lines of the heating element. If there's a break or scratch in the element, that "row" will not work. If you inspect the window and see that the lines are cut/scratched, you can repair them. Here's an old Popular Mechanics article that explains how: http://www.popularmechanics.com/cars...enance/4221212 There is a variety of products (search Amazon) you can use to repair the break(s), and there are a number of YouTube videos if you want to see someone else do it first.

POST 3 / ORIGINAL POSTEROriginal post

Thanks, 5CHN3LL. The windows were never tinted, at least to my knowledge. I will check the lines carefully to see if there are any breaks or scratches in the element.

POST 4 / ORIGINAL POSTEROriginal post

Just to follow up: The solution was very embarrassing. Turns out the fuse was missing. I popped it back in from the reserve fuses and voila! Problem solved. The question of why or how it was missing in the first place is what bothers me.

POST 5 / ORIGINAL POSTEROriginal post

Follow up #2: I spoke too soon. Turns out only about 3 or 4 lines work. Any ideas on where else or what to look for?

POST 6 / ORIGINAL POSTEROriginal post

Bump. Any suggestions on where to begin troubleshooting? I can't seem to find any "visible" breaks or scratches on the lines. I'm not sure why or how only 3 or 4 lines work. There's got to be something more. Perhaps a plug I can trace it back to or relay? Thanks in advance!

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