White powder coming from the vents

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White powder coming from the vents

I have recently experienced a fine white powder (significant quantity) coming from the air vents with the climate control on. I would like to know what this might be, if it is harmful and what could be done about it.

I understand this might be due to a faulty evaporator where the aluminium has oxidised and come through the system, but may have other causes.

Asked on 1 January 2012 by ptbob

Answered by Honest John

Possibly residue from a leak of refrigerant. Get it to an a/c specialist.

Tags: air con technical issues

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