Discussion
Hi guys
Have had the car a few months so this is the first cold weather I've had - it's a 997 cab (yes yes a bit girlie, but it is manual and a sports exhaust, and I *am* a girl ;-) )
My issue is demisting the windscreen (a boring issue to have!) I see in the manual that the a/c turns off below 3degrees, and although the blowers are going at full tilt onto the windscreen its taking several minutes before I can drive away.
Is this normal? It seems a bit weird to me, am I missing a button somewhere !? I have the windscreen button on which just directs air at the windscreen, but I don't like sitting and idling the engine when it's cold and would prefer to get moving, but can't without seeing where I'm going :s
Thanks!
Have had the car a few months so this is the first cold weather I've had - it's a 997 cab (yes yes a bit girlie, but it is manual and a sports exhaust, and I *am* a girl ;-) )
My issue is demisting the windscreen (a boring issue to have!) I see in the manual that the a/c turns off below 3degrees, and although the blowers are going at full tilt onto the windscreen its taking several minutes before I can drive away.
Is this normal? It seems a bit weird to me, am I missing a button somewhere !? I have the windscreen button on which just directs air at the windscreen, but I don't like sitting and idling the engine when it's cold and would prefer to get moving, but can't without seeing where I'm going :s
Thanks!
Same in my wife's Boxster. http://www.pistonheads.com/gassing/topic.asp?h=0&a... do keep a cloth in the car and give the screen a wipe before setting off, this speeds the drying process and the demisters take effect quicker.
The demist button does direct all the air at the windscreen and it does clear eventually, but I can't tell if it's turning the a/c on. The manual says that if it's <3 degrees outside the a/c is automatically switched off and you can't override it (which seems bonkers to me) ! But if other peoples cars are demisting ok then there's something funny going on with mine..... just can't figure out what it is - the a/c definitely works fine (it cools the car down when it's hot) and the heaters work, and the blowers go max at the windscreen....
I don't like using a cloth cos it leaves smeary marks on the windscreen
Maybe the boy's ones have extra strong blowers or generate more hot air
(oh there's a joke in there somewhere LOL)
I don't like using a cloth cos it leaves smeary marks on the windscreen
Maybe the boy's ones have extra strong blowers or generate more hot air
(oh there's a joke in there somewhere LOL)So the really quick de-misting happens because the A/C dehumidifies the air. If it's not working (because the temp is below 3 degrees) then it will take (annoyingly) longer to demist.
If the inside of the car is damp at all, then the problem will be much worse. Have you checked the carpets etc to see if they are damp?
I had a similar problem in one of the Bert-Fleet and found the rear-footwells very wet. Solved that problem and it's back to normal. Rapid demist in warmer temps and slow demist when it's colder and the AC doesn't come on.
HTH
Bert
If the inside of the car is damp at all, then the problem will be much worse. Have you checked the carpets etc to see if they are damp?
I had a similar problem in one of the Bert-Fleet and found the rear-footwells very wet. Solved that problem and it's back to normal. Rapid demist in warmer temps and slow demist when it's colder and the AC doesn't come on.
HTH
Bert
dreamer75 said:
...I don't like using a cloth cos it leaves smeary marks on the windscreen
Maybe the boy's ones have extra strong blowers or generate more hot air (oh there's a joke in there somewhere LOL)
The implication is that real men drive coupes and GTs not roadsters or convertibles. Maybe the boy's ones have extra strong blowers or generate more hot air
(oh there's a joke in there somewhere LOL)
As for the cloth I think it's the only way, ensure the screen is spotless to start with (always a good idea) and use a clean the duster and it should be fine. If you look my thread it seems 90% of owners have this problem with convertible Porsches. Mine is 3 years old, I've checked the drain holes and the dealer also did it at the last service and it still mists heavily. BertBert said:
...If the inside of the car is damp at all, then the problem will be much worse. Have you checked the carpets etc to see if they are damp?
I had a similar problem in one of the Bert-Fleet and found the rear-footwells very wet. Solved that problem and it's back to normal...
p.s. Does the 911 Cabrio have a similar roof mechanism to the Boxster i.e. when raised it seals inside the rear bodywork with drian-holes either side at shoulder level near the top seat belt mount? If so worth checking these are clear. I had a similar problem in one of the Bert-Fleet and found the rear-footwells very wet. Solved that problem and it's back to normal...
The drain holes did block over the summer, and the dealer unblocked them for me - it did get damp then, but they dried it out - I'll check the rear carpets and make sure it hasn't happened again.
Is clearing the drain holes something I can do myself? I get the impression it's not uncommon as an issue....
And yes I think the roof is probably similar - a little lid lifts up, the roof folds down inside, then the "lid" comes back down again.
(Sorry this sounds really really girlie - I promise I'm not that bad !)
Is clearing the drain holes something I can do myself? I get the impression it's not uncommon as an issue....
And yes I think the roof is probably similar - a little lid lifts up, the roof folds down inside, then the "lid" comes back down again.
(Sorry this sounds really really girlie - I promise I'm not that bad !)
As others have said or implied, the cleaner the screen is - the easier it demists - but I've always found that all cabs take longer to defrost than coupes.
I think it must just be that the coupes retain more heat inside the cabin as they're warming up and that the cabs let more of the heat out through the roof, seals and drain holes .....
Still I love seeing the vapour curl off the exhausts as she's warming up in this weather, so I'm always happy to sit there for a minute or two and let her fluids warm up ....
I think it must just be that the coupes retain more heat inside the cabin as they're warming up and that the cabs let more of the heat out through the roof, seals and drain holes .....
Still I love seeing the vapour curl off the exhausts as she's warming up in this weather, so I'm always happy to sit there for a minute or two and let her fluids warm up ....
My 996 turbo takes quite a while to demist, and I got tired of it several weeks ago. Old trick from my motorcycle days - clean the inside of the windscreen with a small amount of neat washing up liquid. Be careful to wipe it all off or you'll get smeared headlights from other cars in the dark. But it works - even in current temperatures, mine does not mist up inside.
I did it about 3 weeks ago I think and expect it to last another week or two before I need to do it again.
I did it about 3 weeks ago I think and expect it to last another week or two before I need to do it again.
Its all relative, if the screen becomes cold quicker than the air inside the car there will be a point when condensation WILL form on the inside.
Just the same as when you drive the perfectly dry car out of the garage in the Winter and subject it to the relatively warm morning air.
Its wet through in seconds.
I'd try parking it as close to the house as possible or maybe in a different position.
Just the same as when you drive the perfectly dry car out of the garage in the Winter and subject it to the relatively warm morning air.
Its wet through in seconds.
I'd try parking it as close to the house as possible or maybe in a different position.
Ah the fairy liquid, we used to cut a potatoe in half & rub that all over then wipe worked a treat!
Silica is good or cat litter in a jiffy bag with holes on the upside ,assorbs quite a bit.
I your really a daft as me then I put a eer mat on the dash & squigee the screen,well I have a Tvr what do you expect
Silica is good or cat litter in a jiffy bag with holes on the upside ,assorbs quite a bit.
I your really a daft as me then I put a eer mat on the dash & squigee the screen,well I have a Tvr what do you expect
dreamer75 said:
The demist button does direct all the air at the windscreen and it does clear eventually, but I can't tell if it's turning the a/c on. The manual says that if it's <3 degrees outside the a/c is automatically switched off and you can't override it (which seems bonkers to me) ! But if other peoples cars are demisting ok then there's something funny going on with mine..... just can't figure out what it is - the a/c definitely works fine (it cools the car down when it's hot) and the heaters work, and the blowers go max at the windscreen....
Below 3'C there is little/no water vapour left in the fresh air coming into the cabin - so all A/C will do is chill the incoming air even more and slow down the rate of demisting. Hence, the demisting only really starts once the engine gets some heat in it - which takes time.If you have air recycling on, that would be a different story as the inside air will be warmer and wetter than outside.
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