13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFan...tastic (FAN QUESTION)
Reported or suspected cause
absolutely nothing
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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Reported cause · Original poster
im a bit disappointed but as you can see I had a lot on my mind - which turned out to be absolutely NOTHING!
Leading evidence: 'absolutely nothing' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'absolutely nothing' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check over at the specialist (it was just me [' (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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Suggestion · Original poster
after the check over at the specialist (it was just me [
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Suggestion · Original poster
Well after a hefty test with a/c on the car remained a constant 82...
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.
13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 1 discussions
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Just to fill people in... my earler post relating to a MAF sensor was ok today by a porsche specialist... but i'm now panicing over the fan... below you'll find what I posted on my MAF sensor post.
Any advice would be greatfully appreciated...
Right guys... heres the analysis.... car was found to be OK... after the check over at the specialist (it was just me [
]) yes, you can all laugh at me now!
BUT, and it is a BUT! whilst driving home the 20 miles from the garage during the rush hour... after 10 mins of good driving, I had the pleasant experience of being sat in traffic, never noticed until about 10 mins into this traffic that my temperature gauge had reached something in the region of about 92 (needle pointing at the right handside of the zero of the 80 mark or a mm past it, when it normally fluctuates around 82 or left hand side of zero on the 80 mark...) obviously once i began moving briskly it naturally dropped slowly back to its normal area.
Is this the norm... Porsche Guru aka Richard do you have any answers..? Guys, any thoughts?
Once home I sat on the drive with the spoiler raised to see whether the fan would kick in, again it reached 91ish after 10/12 mins but the fan failed to kick in,.... at what temperature does it kick in? (at this point the down pour deterred me any longer staying outside, and could not be bothered to move cars around to put it in the garage... hence why Im on here seeking some advice (again)
NOTE: THE FAN IM REFERRING TO IS THE ONE ON TOP THE ENGINE BAY/LID.
How often do the front fans kick in? what temperture?
Any checks etc...?
God, i'm beginning to break into cold sweats over this now.... or is this a case of LAUGH AT ME AGAIN?
I appreciate any help...
Cheers
Chris
Chris
DON'T PANIC
. I don't think you are experiencing anything abnormal. It has taken me a while to find it, but here is what the workshop manual says about the fan cut-in conditions:
Switch-on conditions for coolant
or condenser blower motors:
Stage 1 is switched on when the coolant t
emperature is >100 °C
or
there is an A/C demand, the intake air
temperature is >8 °C and terminal 15
is switched on.
Stage 2 is switched on when the coolant
temperature is >105 °C
or
the refrigerant pressure is >16 bar.
Switch-on conditions for engine
compartment fan:
The engine compartment fan is switched
on when the engine compartment
temperature is >80 °C
or
the coolant temperature is >102 °C.
After-running of engine compartment fan
If the ignition is switched off and the engine
compartment temperature is more than 60 °C,
the DME control module remains in readiness
for another 20 minutes. During this time, the
engine compartment temperature is retrieved
every 10 seconds. If the engine compartment
temperature is >85 °C, the engine compartment
fan is switched on for 20 seconds. If the engine
compartment temperature is still >85 °C after
this time, the fan remains on for a further
30 seconds.
80 degrees C is a very high temperature to be inside the engine compartment. Also, the light on the temperature gauge would flash if the compartment is too high. The front fans won't come on until the coolant temperature gets up to 100 (or if you have the A/C on and a power supply [terminal 15]).
I don't think the gauge reading is too high as a result of stop-start traffic for 10 minutes.
Edit: Typo correction - "coolant OR condenser blower motors"
(Wiping the sweat from my brow) Thanks Richard... thats great news... but alas - the car is going back in tomorrow for peace of mind!
This is becoming quite expensive for something that isn't wrong!
Thanks Richard... I think I speak for us all when I say that you an expert of these matters and a great help!
So what happened yesterday wasn't abnormal...?
Normally the highest i have ever seen was 85... will all 996's react like this and creep up? Would leaving the A/C on improve cooling - as far as im aware dont the front fans come on in conjunction with the A/C?
No it's not abnormal, and yes the fans will come on if there is an A/C demand. The fans running at stage one are fairly quiet, so you might not hear them in the cabin. You will hear them roaring when they switch to stage two.
I wouldn't worry unless the gauge reads over about 90 under normal driving conditions (ie not stuck it traffic), or the light is flashing. If it does read high when driving, it is probably something simple like the thermostat not opening fully. Remember that the water is not going to boil at 100, as it is under pressure.
Last one... honest[
] By keeping the AC on, will it ensure the engine temp will remain more normal as the fans are on? As I normally keep the AC on... i think yesterday was a rare time when it was generally left off.
Thanks again
Well after a hefty test with a/c on the car remained a constant 82... this was during normal driving, fast driving and of course leaving it simply idle.
So all is well... i didn't take the car back based on all this information - thanks again Rich!
So, i'll stop worrying and just enjoy the car............ well, stop worrying for now!
Hi Chris,
This is where you are hiding!!!
I always keep my aircon on all year round. It apparently stops the seals from drying out and less hassel than being kept switched off apart from the 3 days in the summer when we need it!
Also in winter with the aircon on it will demist the windows quicker due to the vapourisation process.
Missed you Saturday, we had a good run out.
Cheers Alan.
Just to add my 2p's worth...
Yes, it is absolutely normal for the temp to creep up a little in stop/start traffic with the aircon off. Yes, with the aircon on, the main fans on the rads are continually running in slow mode so the temp won't creep up as much. I agree with everything said in previous posts.
One thing to add though. The aircon condensers and rads get chock full of debris over time. In particular, the space between the condensers and rads can become blocked with leaves, sweet wrappers, all sorts of stuff!! Once this build-up of detritus gets too much, your temperatures will begin to soar which is not good for your engine. Have the rads cleaned out at least once every couple of years. (Front PU off, ducting off, release the condenser mounts and blow/vac as much out as possible - it's been documented quite well elsewhere on here).
Hope this helps
Hi Alan... yes I know... im a bit disappointed but as you can see I had a lot on my mind - which turned out to be absolutely NOTHING!
Which isn't a bad thing - I must learn to relax!
Well Alan, let me know of any further events and i'll be there! If you want an impromptu drink and chat let me know... Friday night is always good for me as my other half is normally tied up with paper work. (The pain of being a teacher - i did tell her)
Thanks Ian for the advice... great to know that others have experienced this, i'll make an effort one day and undertake the task of cleaning out any debris. Probably when it gets a little warmer
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