2016 z4 condensation

[Deepseaskateboard]

I put some damp traps in the car over winter.

One in the cabin, one in the boot.

What's a damp trap, please?

I've used these in the past..... amazing how much moisture they capture.

https://www.halfords.com/motoring/car-a ... 70096.html

Yeah, I have one of these which lives on the parcel shelf behind the seats, it’s the same colour as the carpet, so un-noticeable. It’s great.

[Deepseaskateboard]

I put some damp traps in the car over winter.

One in the cabin, one in the boot.

What's a damp trap, please?

https://www.ebay.co.uk/itm/266019415797 ... media=COPY

Not the most eco friendly product, but what are a few whales and trees when you can have a moisture free car interior!

You can pick them up cheaper around town, about £1-£2 each.

[Deepseaskateboard]

Dry the cabin as air by whatever means you want - but open a door and in an instant it all goes back to whatever the ambient humidity of the surroundings is.

Or drop the roof!

I think the idea is that the mositure ends up in the trap rather than in the battery bay, or elsewhere.

[ronk]

Are they just bags of Silica Gel ?

[DevonPaul]

Assuming there isn't a leak or blockage in any of the drains, one thing that can help is to check whether you have the air in vent or recirculate.

We pretty much always have it on vent, and when coming home in very cold weather for the last 1/4 mile turn the heat down and drop the windows an inch - that fills the car with colder air so less condensation. Very rarely do we need the aircon to demist the windscreen.

[N4LLY]

Are they just bags of Silica Gel ?

Airdry contains 100% natural granules made of clay, salt and starch

[ronk]

More absorbing than a Jacobs Cracker Biscuit!

[N4LLY]

More absorbing than a Jacobs Cracker Biscuit!

More absorbing than a Pampers!

[MikeyH]

On that note, could you not just lay a lot of Lill Lets all over the place

[N4LLY]

On that note, could you not just lay a lot of Lill Lets all over the place

I would hope those dont contain "clay, salt and starch"

[mcbutler]

Using the Aircon to demist generally creates excess moisture, I try to avoid and never had moisture issues on my 2010 model.

Forgive me but that is the exact opposite of aircons effect. If you put the heating on hot or cold and aircon you get hot/cold dry air. The moisture in the air condenses on the heat exchanger matrix and after a few minutes use can often be seen dripping underneath from the drain.
If you drive the car for the last mile with the aircon on, set the system to recirc and full fan this will dry the air in the car before you leave it.

Same as a frost free fridge/freezer basically

[Zforbes]

Using the Aircon to demist generally creates excess moisture, I try to avoid and never had moisture issues on my 2010 model.

Forgive me but that is the exact opposite of aircons effect. If you put the heating on hot or cold and aircon you get hot/cold dry air. The moisture in the air condenses on the heat exchanger matrix and after a few minutes use can often be seen dripping underneath from the drain.
If you drive the car for the last mile with the aircon on, set the system to recirc and full fan this will dry the air in the car before you leave it.

Same as a frost free fridge/freezer basically

Sorry for the confusion I should have been a bit more detailed.

Using Aircon to demist in short bursts doesn't have chance to dry out the condensate. If running constantly then it dries out, if you turn the AC off after demisting it'll steam up again.

[Portisz4]

Hello.
So I have checked around for wet lately in the cockpit .
What I have discovered is above the roof lining is dripping wet. I can see between the lining and the windscreen if I pull back the roof liner slightly. Why would this be wet?
How do I remove the roof liner to investigate ?
Couple of attached images but I can pull it back too far , I need to properly undo it. Not the best pics but I was able to slide the phone up into the gap. Seems a lot of moisture up there

[mcbutler]

It’s maybe not the most fuel effective way

It was always quoted in the 'old days' that a car used around 10% more fuel with the a/c compressor running. As refrigerant has become a LOT more efficient over the years the compressors have got smaller, needing less energy to drive them. Electronics now control them a lot more efficiently too. Cars in general produce a lot more power, so the percentage of engine power is very very low.
I would be surprised if fuel efficiency drops by more than a couple of percent with the a/c on these days TBH. I heard that opening the window is worse for fuel efficiency!

If you look at the back of your modern domestic fridge, running on R600a (butane!! ), the compressors are absolutely tiny these days. Yes folks you have highly combustible butane under massive pressure in your kitchens. Scary, huh?

HAH - go find a nice flat stretch of road and try your theory, been there and i found around a 10% increase in fuel consumption when compressor initially engaged, improved a small amount once temp achieved and the system was cycling on and off.

[clarker63]

If your carpet is wet or you have anything damp in the cabin, water will condense where its cold, it might not be actually coming in there.

Have you looked under the carpets? I suspect you'll find they're wet, or the boot is..