7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996TT HVAC system foam breakdown??
Leading reported evidence
Repair blend doors
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
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Suggestion
Two choices (1) blow everything out until it stops (it will) and vacuum everything up; (2) repair the blend doors with new foam through the heater core (requires some tricky work removing the heater core and blend door).
Leading evidence: 'Repair blend doors' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair blend doors' (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.
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
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Suggestion
There are a couple of different repair methods with several variations that re all well documented.
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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Suggestion
You do need to be courageous enough to repair your precision Deutsche machine with duct tape/similar material.
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.
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.
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Suggestion
They will want to remove the entire dash and replace the entire HVAC unit.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Repair blend doors
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
Two choices (1) blow everything out until it stops (it will) and vacuum everything up; (2) repair the blend doors with new foam through the heater core (requires some tricky work removing the heater core and blend door).
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 scroll through the thread above I used the method oat post #239 in that thread, but everyone has their own preference / rationale for their approach.
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.
7 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: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'm wondering if anyone else has experienced the issue of foam particles/chunks coming out of the HVAC Vents? Please see the picture. Any advice?
Foam particles visible on dashboard
The foam that covers the HVAC blend doors breaks down and comes out the vents. Two choices (1) blow everything out until it stops (it will) and vacuum everything up; (2) repair the blend doors with new foam through the heater core (requires some tricky work removing the heater core and blend door). Search this forum for fixing the blend doors. There are some detailed threads on the work required. Do not take it to a dealer! They will want to remove the entire dash and replace the entire HVAC unit.
https://rennlist.com/forums/996-foru...ntn-issue.html
Mine blew out about 15 years ago. I did not repair. Tweezers help to get the foam out of the vents. Shop vac the crap out of the vents. I haven't noticed any difference heating and cooling. Blows warm/hot when the heater is on. And blows super cool when the AC is on. About a year ago I had my AC system serviced with a nitrogen flush and new recharge. I figured at 25 years on the initial OE charge, I'm doing pretty good.
I wouldn�t call the blend door repair �tricky�. On a scale of 1-10, I would put it in the 3-4 category. You do need to be courageous enough to repair your precision Deutsche machine with duct tape/similar material. I know that will sound like sacrilege to some�.
If your heat still works its only because there is still enough foam in place at the blend door to direct the air. But eventually with enough foam loss the heat will stop functioning. I tackled this last year after a year of annoyance at not having any heat all last winter. The link posted above by DBJoe996 has everything you will ever need to fix this including several YouTube links and tons of photos. There are a couple of different repair methods with several variations that re all well documented. If you scroll through the thread above I used the method oat post #239 in that thread, but everyone has their own preference / rationale for their approach.
