# AC blowing white, non-odorous smoke/vapor **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** accord, honda\ **Created:** [July 30, 2021, 4:21pm UTC](https://community.cartalk.com/t/ac-blowing-white-non-odorous-smoke-vapor/178377 "2021-07-30T16:21:59Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![GWilliamT](https://avatars.discourse-cdn.com/v4/letter/g/e19b73/32.png) [@GWilliamT](https://community.cartalk.com/u/GWilliamT)\ **Post date:** [July 30, 2021, 4:21pm UTC](https://community.cartalk.com/t/ac-blowing-white-non-odorous-smoke-vapor/178377/1 "2021-07-30T16:21:59Z")
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? ---
**Author:** ![rsss69cam\_162177](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/rsss69cam_162177/32/21024_2.png) [@rsss69cam\_162177](https://community.cartalk.com/u/rsss69cam_162177)\ **Post date:** [July 30, 2021, 5:40pm UTC](https://community.cartalk.com/t/ac-blowing-white-non-odorous-smoke-vapor/178377/2 "2021-07-30T17:40:03Z")
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. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [July 30, 2021, 5:47pm UTC](https://community.cartalk.com/t/ac-blowing-white-non-odorous-smoke-vapor/178377/3 "2021-07-30T17:47:35Z")
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. Tester ---
**Author:** ![GWilliamT](https://avatars.discourse-cdn.com/v4/letter/g/e19b73/32.png) [@GWilliamT](https://community.cartalk.com/u/GWilliamT)\ **Post date:** [August 4, 2021, 8:49am UTC](https://community.cartalk.com/t/ac-blowing-white-non-odorous-smoke-vapor/178377/4 "2021-08-04T08:49:23Z")
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.