Has anyone encountered humidity being trapped inside of their cabin? I haven't been driving the XJR much at all lately, just been sitting in the drive way. Rainy season here in WA, so I'd rather not drive it much. There's been an issue with humidity being trapped inside the car. When it does get driven, the heat stays in the car I assume. The windows will get fogged up and when you open the door the next time, there will be some condensation between the drivers door and side of the dashboard. Will be really humid inside as well.

Under the dash gets condensation also. Even when the car has not been driven around, this happens. Or say if I just run the car for 10 minutes or so...I turn the A/C on to knock off some of that humidity, but once I close the car and let it sit a bit...back to fogged windows. This may be attributed to the rainy weather as well, with the temperature fluctuations between inside the cabin and the outside air.

However, I have noticed some mold issues as well because of this. ONLY on the drivers seatbelt, rear driver side seatbelt, also the front right seat bracket bolt area of the carpet. Not a whole lot of mold, and it was easily cleaned with some disinfectant wipes. But this problem is really frustrating. There's no water leaks into the car, no water under the carpet, etc. I've checked that.

 

Not an expert on this model by any means, but I'd suggest may be a combination of things.
You will be taking moisture into the car with you, door / window seals etc alright?
Also, do you have a pollen / cabin filter and if so have you changed it out?


I also leave my A/C on year round to help with these issues, as well as continuous use to help lubricate the seals, it's a case of use it or lose it


Hope to hear...

 

If a car stands, condensation forms inside. So it gets humid. Unless it is parked in a dry garage. Cars aren't actually made to sit and stand... So get out, drive it around with the AC on (AC dries the air and removed humidity) and it should be alright again.

 

I suspect you have a few things going on here that can cause the problem you are seeing.
I have attached a diagram of the airflow for the x308. In normal use the a/c system is in auto and the recirc button is off. This allows airflow thru the vehicle as shown.
The vents on the rear parcel shelf need to be unobstructed. The vents on the sides of the trunk likewise need to be unobstructed. The usual problem is the vents in the trunk get knocked loose from the liner and become blocked, also debris gets in the way of the openings in the body area of the trunk blocking flow.
I would take a look at the trunk vents first and set the system on auto and give it a good drive. If all of the vents it should stop the humidity in the car.

 

A few months ago I had the sunroof leak and when that happened one morning, the interior was very humid and was not pleasant. I let the Jag air out through out the day in the sun with the window open, ect so everything can dry. Then I had the sunroof seal replaced and she's been great since.

As Avern said I would also check the vents as well. If you can, go for a drive and have the auto mode on. This will dehumidify the air.

Good luck!

- Pilotman

 

Have you ever left the windows open in the rain, even cracked in a heavy rain?

I ask because I left a window open and it rained. It took *forever* to get the moisture out of the car even though it didn't get all that wet. No standing water, but the passenger seat got soaked. IIRC it was 2-3 weeks in TX hot weather for it to finally stop fogging up on the inside.

If not, I would suspect you have a leak somewhere. Dry it out and either with the hose or the next rainstorm, go out and sit in the car and see if you can determine where it is coming from. That much water should be obvious.

Just spitballing, but I wonder if it could be a windshield seal?

-Mike

 

It is most likely the door or window seals. If possible, go to a mechanic with a smoke machine and smoke the interior. Then look for signs of smoke exiting the car.

 

I've used Damprid moisture absorbers in the past when I had this issue, I also put silica gel packs under seats etc.