Inside vent dust
Champion
Joined: Dec 2007
Posts: 3,563
Likes: 0
From: Ontario, Canada
The Dreaded White Dust From The Vents:
Moisture/water in the Heating/AC system housing is corroding the aluminum evaporator, and thats where the white dust is coming from. Putting it on RECIRC or FRESH AIR will never fix the actual problem. Check the A/C drain, it might not be draining off the condensation properly and holding water and rotting the evaporator within the heating system housing. As it dries out, the corrosion dust blows out thru your vents.
Also, if you have a 3rd brake light leaking, (and or door seals) you`ll have ALOT of moisture inside the cab of your truck. The A/C system is trying to keep up with removing moisture within the cab and traps alot of it within the heating system. This isnt helping the evaporator at all, by having all this water/moisture inside the cab all the time. The 4th gen heat-a/c system is a very poor design. And like another person said in here, he`s exactly right, the heater air filter mod will NOT fix the problem either.
One thing that may help, try to drive often as possible with the the windows open to help dry out your truck from time to time. This seemed to help solve some of the problem for me.
Moisture/water in the Heating/AC system housing is corroding the aluminum evaporator, and thats where the white dust is coming from. Putting it on RECIRC or FRESH AIR will never fix the actual problem. Check the A/C drain, it might not be draining off the condensation properly and holding water and rotting the evaporator within the heating system housing. As it dries out, the corrosion dust blows out thru your vents.
Also, if you have a 3rd brake light leaking, (and or door seals) you`ll have ALOT of moisture inside the cab of your truck. The A/C system is trying to keep up with removing moisture within the cab and traps alot of it within the heating system. This isnt helping the evaporator at all, by having all this water/moisture inside the cab all the time. The 4th gen heat-a/c system is a very poor design. And like another person said in here, he`s exactly right, the heater air filter mod will NOT fix the problem either.
One thing that may help, try to drive often as possible with the the windows open to help dry out your truck from time to time. This seemed to help solve some of the problem for me.
If you drain is plugged and easy way to know is under you car with air on you should see a puddle form quickly when parking idling. If not get it checked.
Registered User
Joined: Sep 2016
Posts: 1
Likes: 0
I have an issue on my truck>> white dust coming out from the vent when ac starting to kick on. How can i solve the issue and are these particles harmful to our health?
Last edited by hanker251976; Sep 4, 2016 at 05:31 PM.
Captain
Joined: Feb 2012
Posts: 515
Likes: 5
From: N. KY
corroding aluminum from the AC cooling fins is white, (aluminum oxide) breathing aluminum oxide dust is never good... google "breathing aluminum oxide dust"
read thru all the posts above for hints on what to do next to help eliminate the problem...
several products available from amazon...
read thru all the posts above for hints on what to do next to help eliminate the problem...
several products available from amazon...