White dust coming from dash AC vents

[Mikeborny]

I have noticed a lot of white dust on my dash and it looks to be coming from the AC/heater vents. Is this a mold issue? Any solutions I should look at.

[Goldencrazy]

I've noticed a lot white stuff in my hair too. Could it be complete nag from the dash?

[Mike_Hohnstein]

Anthrax

[willi4nd]

Calcium forming on the condensate coil ?

[katoomer]

Grab yourself a straw and enjoy

[jfkmk]

Rollnhome wrote:
Was the previous owner a drug dealer or the production company for Breaking Bad. 🙂

Or maybe John DeLorean?

[MountainAir05]

But mold can and does grow in the AC system duct. All it needs is damp air, If the cooling coil does not drain and stays damp, mold will grow. Have clean many in my years, home and vehicle with mold. In home use there is a UV lamp that kills it. They made a cleaner for this. White color, as others have stated could be dust coming thru or dirty filter is you have one.

[Rollnhome]

Was the previous owner a drug dealer or the production company for Breaking Bad. 🙂

[DrewE]

In my opinion, it's unlikely to be mold in the air conditioner system. Mold needs something organic to grow on, and the air conditioner evaporator is made of metal and the ductwork of metal or plastic. Mold doesn't grow on those materials.

If you do have a cabin air filter in the system, it would not hurt in the least to replace it or at least check it. Not all vehicles have such a filter. If they do, often it's behind the glove box.

[rgatijnet1]

If you bought the coach used, it could be that the previous owner dropped something in to the vent opening by accident. Does it have any odor?

[BobR]

It could be talc used to eliminate or reduce dashboard squeaks.

[Teacher_s_Pet]

In our 97 Intruder it might have been from when the previous owner set off a fire extinguisher, just before it was repossessed by the lender.

[tatest]

You won't know what the dust is unless you send it to a lab to analyze it. It is whatever is in the air when you are moving. Your ventilation system almost certainly draws air from outside, and probably does not have an environmental air filter.

I've had three vehicles now with the filters, supposed to be sized to trap pollen (which comes in a wide range of particle sizes) and I've found they get as dusty inside, as fast, as those without filters. Where I am, a lot of what gets through is smoke particles, much finer than most of the pollen filters are supposed to trap.