AC blowing white, non-odorous smoke/vapor

95 Honda Accord.
The AC started blowing white smoke or vapor into the cabin. No strong odor, but perhaps faintly suggestive of coolant. Ambient temp 86F, humidity 12%. In the past weeks temp has been 90 - 100.

No smoke with AC off, blower on.

I’ll be checking/clearing the evaporator drain. What are the other possibilities?

when I was Toyota-the avalons (2010+?) has an issue with the evap core doing the same thing-it turned out that the core was desinagrating, blowing a white smoke into the passenger compartment.

The odorless, white steam or smoke coming out of your air conditioner is probably excess water stored in the heater box . Commonly, it is a sign of a restricted drain hole that needs cleaning. The steam or vapor collected during the process of condensation could have made its way out when the air hit it.


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Thanks for the replies. The incident has not happened again and I have not checked the drain tube yet . . will eventually, maybe tomorrow when I’m checking a new problem with the coolant system. But that’ll be in another post.