Condensation on the rear window.

I just checked the hygrometers:

ambient is 95%
F-Type is 95%
Disco 5 is 92%

So no drastic differences, no "100%" or above in the F-Type. No condensation sofar.

Tomorrow I'll push it out of the carport. See what happens in the rain..
 
I know experienced this two times. First time I thought water entered the interior from the jets at the carwash.
Second time I thought it came through a leak in the rear hatchdoor..

But there is no water to be found, no spot with wet carpet or such..

My theory is to do with weather conditions. Both occasions the day was warm and quite humid, and I suspect the
car heated and pushed air out through the exit vent in the left rear above the wheelarch..

Then, while cooling down, sucked air into the car with high humidity. While the outside temperature dropped further,
the humid air got over saturated and water condensed on the inside of the rear door.

Drying the window with a cloth, prevented the window fogging up the next evening, after a cooler day...

Anyone has the same experience ... :idea:
 
I occasionally get misting on the front screen, but it clears quickly with the front heating element and the blower. My previous Jags used to mist up, too, worse than I've seen so far with the F-Type.
 
Look under the boot carpet. The battery cover and the bottom trim pull out easily. Mine had a small paddling pool under the carpet, caused by water leaking in through the trim clips that secure the plastic gutters each side of the hatch opening.

Mine does get some condensation on the inside of the windscreen on a frosty evening, especially if the car has been warmed up during the day. Might be worth checking that your pollen filter isn’t wet.
 
Previously covered in this topic https://www.ftypeforums.co.uk/viewtopic.php?f=21&t=5043
 
GARETH said:
Look under the boot carpet. The battery cover and the bottom trim pull out easily. Mine had a small paddling pool under the carpet, caused by water leaking in through the trim clips that secure the plastic gutters each side of the hatch opening.
Click to expand...

That was the first I checked.. .. dry as sahara sands...


GARETH said:
Mine does get some condensation on the inside of the windscreen on a frosty evening, especially if the car has been warmed up during the day. Might be worth checking that your pollen filter isn’t wet.
Click to expand...
I tried this by driving the car without the AC on, heating it though. But that was the day after the first 'fogging' happened..

But soon it will be not cold enough to find this out. Service due in two weeks.. .. end of guarantee. Hits the 3yrs mark then.. :shock:
 
Heating does not dry the interior, it's actually keeping it moist.

If you want to dry the air and interior, MAX out the AC in defrost mode and recirculation ON.

Cold air from the the AC is relatively dry.
 
Tel said:
MAX out the AC in defrost mode and recirculation ON.Cold air from the the AC is relatively dry.
Click to expand...

The air from the AC is dry.. ..but condensation stays in the AC unit. That goes into the cabin when its cold, and your windows fog up.

So I drive the last 5 minutes or so, with the AC off.. This is my experience after 40yrs and more than 80 cars. :ugeek:
 
Dan_Veluwe said:
Tel said:
MAX out the AC in defrost mode and recirculation ON.Cold air from the the AC is relatively dry.
Click to expand...

The air from the AC is dry.. ..but condensation stays in the AC unit. That goes into the cabin when its cold, and your windows fog up.

So I drive the last 5 minutes or so, with the AC off.. This is my experience after 40yrs and more than 80 cars. :ugeek:
Click to expand...



Got to disagree Dan...Condensation does not stay in the AC (condensor) unit, unless the drain is blocked.

Try this experiment to prove my point.
NOTE: Fog is condensation.

Start the car with the windscreen fogged up. Turn on max defrost and the fogging (moisture) will be removed. You should see the clear patch in front of you magically grow before your eyes.

The moisture removed from the windscreen is deposited on the AC condensor where it accumulates into droplets, then puddles and exits the vehicle underneath.

Your scenario would be correct IF you had a blocked condensor drain and/or you have water ingress into the car which is too moist for the AC unit to remove.
 
Tel said:
Your scenario would be correct IF you had a blocked condensor
drain and/or you have water ingress into the car which is too moist for the AC unit to remove.
Click to expand...

Lots of AC's don't work under 5C , like Ford. And not all the water runs out ; look at the interior part of the circuit.

It has relatively small holes where water remains as droplets in edges, quite a lot given the huge amount of surface in the grate..
 
I'm not sure what 5C is Dan, also my Ford's were too old to have AC so I cannot compare.

If your AC doesn't clear the fog on the glass within a few minutes completely, then you have either a blocked drain, wet interior, or the AC needs re gassing.
 
RPSN said:
Previously covered in this topic https://www.ftypeforums.co.uk/viewtopic.php?f=21&t=5043
Click to expand...

Exactly.
As the previous topic was only a few weeks ago, both topics merged.
 
My mazda cx5 windscreen does this from time to time, no leaks it's just a temperature inside versus outside temperature causing it, I was told a few different tips to resolve it, run the air con all the time to dry out the moisture, close all the vents. It still does it sometimes but normally only when very cold outside, the car is a year old never found a leak, checked on last service and they could not find anything wrong either.
 
Tel said:
I'm not sure what 5C is Dan, also my Ford's were too old to have AC so I cannot compare.
If your AC doesn't clear the fog on the glass within a few minutes completely, then you have either a blocked drain, wet interior, or the AC needs re gassing.
Click to expand...

Wit 5C its 5 celsius..

Its not on the inside after starting, Its not on the front window.

The AC hardly gets to the rear window the first 20 minutes I guess, so it only clears from that moment on.
 
Quiet man said:
My mazda cx5 windscreen does this from time to time, no leaks it's just a temperature inside versus outside temperature causing it, I was told a few different tips to resolve it, run the air con all the time to dry out the moisture, close all the vents. It still does it sometimes but normally only when very cold outside, the car is a year old never found a leak, checked on last service and they could not find anything wrong either.
Click to expand...

I am convinced it has nothing to do with the AC in my car. Its just the wind cooling the rear window most.

Like sometimes just one window is covered in ice and te rest is clean. Mostly the front window as that slopes.
 
Hi Dan, Yep you could be right, might just be the rear window cools quicker due to the direction of the wind and the way the car is facing. I no its not something you want lying around in your car but you could try the dehumidifier bags you can get to stop condensation, I use similar in my caravan over the winter, just a thought.
 
@Quiet man__

It happens really seldom, that's why I opened this threat as I couldn't really make out for sure, I thought.

Apparently not many people have the same problem or just see it differently.

I stay with drying the inside with a ragg, since then it stays clear until the next warm/cold cycle.

That way I'm sure its out of the car all together.

Caravans are a different species, I have no knowledge of them.
 
Dan_Veluwe said:
PhilB said:
RPSN said:
Previously covered in this topic https://www.ftypeforums.co.uk/viewtopic.php?f=21&t=5043
Click to expand...
Exactly. As the previous topic was only a few weeks ago, both topics merged.
Click to expand...

That link does not work..
Click to expand...

That's because it's now on the first 2 pages of this thread as I've merged both your topics together to create a single topic.
 
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