MacGreiner
5YJ
My i3 was the worst for this. We located silica gel bead bags around the car - side pockets, boot. Seemed to help.
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Abnormally high fogging on inside of glass?
- Thread starter cleveland97
- Start date
iwannam3
Active Member
Fossil cars run the AC to dehumidify the air when defrost is selected. You will see a small puddle on the floor where the AC evaporator drains the condensate. Sometimes the drain gets plugged and carpets get wet increasing interior humidity. I'm wondering if Tesla doesn't run AC in defrost mode to save power? Can't open the hood and see if the compressor is turning on a Tesla. Does anyone know if the defrost is linked with AC operation?
ℬête Noire
Active Member
Sitting in the car while charging will do it, too. You have to crack the windows and keep air intake going while charging or it'll get everything inside soggy and you'll spend the first several minutes of your drive using battery to dry the interior out. If it is also raining outside then you need to have the A/C drying out that intake air.
i can confirm having a foggy cabin, but only when it was cold out and I was "toughing it out" by keeping HVAC off. With HVAC on auto, I've never had any fogging issues. Auto runs the A/C compressor to dehumidify the cabin. If I have a foggy cabin, running the A/C clears all the fog in less than 1 minute.
The fogging in my car is a terrible problem. The worse part, however, is that overnight the moisture on the windows freeze and I have 1 to 2 mm of frozen ice on the inside of the car. it takes quite a while of running the heater and defroster to melt and clear the windows, often 15 to 20 minutes. A real pain, and sucks a lot of battery.
ℬête Noire
Active Member
You can see that A/C is run in defrost mode by tuning in on then switching to manual control, the A/C button is selected. As well the blue front "defrost" is primarily A/C. It is the red one that cranks the heat, along with A/C.
wow. that seems abnormal. I'd check in with a service center. Have you ever used the A/C in the summer? I took delivery in cold weather, so I didn't notice until months later when it got hot, but my A/C didn't work. If your A/C is in the same boat, it could explain why you aren't getting any dehumidification when running the HVAC on auto.
ℬête Noire
Active Member
Agreed. Potentially aggravated with wet floors or something.
Another possibility is the drain hole under the A/C coils clogging. Some people have reported that they get a musty smell at times because of moisture build-up in that area causing mold. So if that drain clogged that would leave a water reservoir in there which obviously has an air connection with the interior, and that could lead to lots of moisture in the cabin overnight.
Glamisduner
Active Member
I do an 50/50 isopropal/ water wipe, then the 3 towel method with invisible glass or your favorite window cleaner. Of course there will be more off-gassing and it will have to be done again eventually.
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