6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPorsche 911 - 997 (2) - cabin heater - Page 1 - Porsche General - PistonHeads UK
Reported or suspected cause
airlock in the system
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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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 report identifying 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.
Porsche 911 - 997 (2) - cabin heater - Page 1 - Porsche General - PistonHeads UK
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Leading evidence: 'airlock in the system' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'airlock in the system' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check coolant level' (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
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.
Porsche 911 - 997 (2) - cabin heater - Page 1 - Porsche General - PistonHeads UK
Check coolant level and the replacement coolant pipework
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
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Suggestion · Original poster
Update - today the OPC checked coolant level and the replacement coolant pipework, that they installed in the Autumn and could find nothing amiss.
Porsche 911 - 997 (2) - cabin heater - Page 1 - Porsche General - PistonHeads UK
Use bleed
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.
Porsche 911 - 997 (2) - cabin heater - Page 1 - Porsche General - PistonHeads UK
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.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 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: 20261027T025149Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Merry Christmas All,
Drove up the M1 yesterday in my car a 997 (2011) and as I hit the frozen north I put the cabin temperature up to 24 degrees and it seemed to have little effect. Increased the temperature up to 29 degrees and then HI and it got warmer, but only by put the fan up to maximum.
Previously, if I put the temperature up to 24 degrees and the fan on a few bars, I'd be boiling in no time.
The car is well serviced by the OPCs, though I've had a minor clicking noise coming from the rear of the car but had dismissed it as being nothing, no beginning to wonder.
Any ideas, beyond me turning into a soft southerner?
Cheers.
Update - today the OPC checked coolant level and the replacement coolant pipework, that they installed in the Autumn and could find nothing amiss.
I swear the heater is not as effective/warm as it used to be.
I guess I'll keep an eye on it and see if I've lost the plot....
Cheers and Happy New Year All.
Same thing happened to me on a cold snowy day shortly after i'd had my coolant crossover pipes replaced. Turned out to be an airlock in the system .
Took a while for me to work out but one symptom was temp gauge misreading/ showing virtually zero.
Sometimes getting the whole system air free is a little bit of a two stage process. Fill, use, bleed, fill again.
Thanks, that is really helpful MM,
I have asked the OPC to confirm exactly what checks they carried out and whether they investigated an airlock, or if the temperature gauge was faulty.
If coolant system fully checks out ok, it might be the cabin temp sensor - try carefully vacuuming the small grille above the digital display in the climate control unit.
It commonly gets full of dust and lint.
Failing that, get the codes read.
This is a source reference. Confirm exact model applicability in the original material.
