17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
cabin ambient temperature sensor, the one
Reported cause
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Reported cause · Original poster
It was the cabin ambient temperature sensor, the one that sits behind the passenger side air vent.
2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'cabin ambient temperature sensor, the one' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'cabin ambient temperature sensor, the one' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check 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.
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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
1
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Performed · outcome unconfirmed · Original poster
Heater core is hot, warm water going in and coming out, changed relay 18, read that this good be a problem.
2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check doors
Suggestion or failed attempt
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0
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Suggestion
Pull down the heater box and clean it out, checking the doors for free motion and you should be back in business.
2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check servo
Suggestion or failed attempt
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2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check where the water hoses enter the heater
Suggestion or failed attempt
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Suggestion
Your heater core should be hot at all times, you can verify that fact by checking where the water hoses enter the heater under the cowl behind the battery.
2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check where the water hoses enter the heater
No successful repair reported for this finding.
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0
Unsuccessful attempts
1
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Suggestion
Your heater core should be hot at all times, you can verify that fact by checking where the water hoses enter the heater under the cowl behind the battery.
2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Set heater ti high
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Suggestion · Original poster
The trouble is my heater is not putting out warm air when it is set manually anywhere between 18 to 29 on AC or none AC mode, you only get very hot air immediately if you set heater ti high.
2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Set manually anywhere between 18
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Suggestion · Original poster
The trouble is my heater is not putting out warm air when it is set manually anywhere between 18 to 29 on AC or none AC mode, you only get very hot air immediately if you set heater ti high.
2001 986 Heater - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T100758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi All
I am a member on the 911uk forum but no one seems to have an answer for my below problem, can anyone help ?
Well it has been 8 months since I last had my 2001 2.7 Boxster out to play.
The trouble is my heater is not putting out warm air when it is set manually anywhere between 18 to 29 on AC or none AC mode, you only get very hot air immediately if you set heater ti high.
Is this a known problem with a fix, I have read one problem that lay with the heater gate being full of holes after all the foam has broken down on it.
Any further help would be appreciated.
Regards
Neil.
Your heater core should be hot at all times, you can verify that fact by checking where the water hoses enter the heater under the cowl behind the battery. Most likely, if your foam has broken down, one or more chunks of it are holding the air mix door in the wrong position when you set the car to heat. Pull down the heater box and clean it out, checking the doors for free motion and you should be back in business.
Heater core is hot, warm water going in and coming out, changed relay 18, read that this good be a problem. Anyway it was none of these so it must be a bit of foam somewhere, Oh boy !
Will have to try sorting this next.
removing the heater core is not a very complicated task.
if you will remove it, you will gain access to one of the flaps inside the airbox, so you can clean it and the heater core from debris.
here is a write up i made couple of years ago.
check out step #1 in post #14
http://986forum.com/forums/performance-technical-chat/36713-ac-question.html
I have the exact same problem with my 2000 S that Neil describes. I don't see any foam either. I will try looking at the link as well.
I was initially thinking it might have to do with an air bubble in the cooling system...
Neil, please keep us posted with what you find!!
Hi Guys
I have taken the heater core out and there is no foam anywhere in the box, the foam on the flap is all intact and in very good condition, no signs of breaking down.
The question I have now is about the flap.
When the heater is put on high the flap completely opens.
As soon as you set the temp to just below high the flap completely shuts, so at 29.5 c I get cold air.
Should the flap close in a graduated fashion when you go down in the temp settings, if it should then this is my problem as the door just completely shuts when not on the high setting.
Hi Guys
This is the cause of my problem, info from Ahsai on Renntech:-
mondialneil, on 04 Jun 2014 - 7:20 PM, said:
Hi Ahsai
I will check the servo.
So the servo should move the flap bit by bit when you change the temperature setting ?
Cheers
Neil.
Exactly. The servo should move the flap proportional to the temp setting. It should be able to stay partially open so it can modulate the air temp by mixing the right amount of hot air with cold to get the exact temp setting you chose.
In other words, as you change the temp setting gradually, the flap should move bit by bit. That's why there's a potentiometer inside the servo that provides a varying output depending on the degree of opening of the flap. I hope that makes sense.
Hi Dlirium
When I get the replacement I have ordered I will tell you if it corrects the problem.
It would seem though as mine only opens on HI for hot air and then shuts when moved from Hi and the fact that the servo graduates the opening for the temp scale where mine is shut tight this will correct the problem.
On my UK car the servo is in the passenger side footwell on the underside of the heater box, not hard to do from what I have seen.
Cheers
Neil
Yes Yes Yes it is sorted.
It was the cabin ambient temperature sensor, the one that sits behind the passenger side air vent.
One of these came up on Ebay for £10 secondhand so I bought it, just to try, as it was not too expensive.
Also I had read somewhere this could be a culprit and it was.
Happy chap now lol
