Air flow direction issue

[fringe marlin]

I own a 2011 Honda Civic. Every morning before work or school i use my auto start to turn it on so it can heat up. No issues. But the problem is I can’t defrost my Front windshield because most times, the airflow direction doesn’t work properly.

I will have it on front windshield defrost the day before. But when i get into the car, when front windshield direction is on, the vents for my face is still where the air is flowing, even though it’s on front defrost.

the thing that’s weird is sometimes it does as it should and defrosts, but most times, 9 times out of ten, it doesn’t work as it should.

[distant hemlock]

This may be a blend door problem, and in some cases I have been able to “reset” it by switching the mode all the way to floor only and then a few seconds later, all the way to defrost only. Granted, that’s a workaround

[fringe marlin]

okay, i’ll try that

tyty

[distant hemlock]

https://youtu.be/1aVzyMOsArw?si=qqEEA8fupG4ZZZdt may be helpful for an actual fix

And source (also with some other useful info) was https://www.8thcivic.com/threads/blower-does-not-switch-between-vents.569810/

And here’s the diagnostic info https://www.8thcivic.com/threads/hvac-self-diagnostics.658696/

[fringe marlin]

could an obd2 scanner detect the issue?

[ivory pier]

GG @fringe marlin, you just advanced to level 1! Chat more to level up and earn top roles!

[distant hemlock]

Maybe a Honda specific one, but the generic consumer grade ones usually don’t find codes unless there’s a Check Engine Light on.

[fringe marlin]

ah okay

[fringe marlin]

figured out the problem and this is in fact the issue. thank you!