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Defrost not working

Tiny
LJCALLES
  • MEMBER
  • 2004 TOYOTA COROLLA
  • V6
  • AUTOMATIC
  • 96,000 MILES
When I switch to defrost the air continues to blow out the air conditioner/heater vents not on the windshield, switching the controls (face, feet etc) does not change to direction of the air flow.
Wednesday, October 12th, 2016 AT 7:57 AM

30 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
It sounds like you have a mode door actuator that is not working here is a guide that will help you.

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

Please let us know what you find so it will help others.

Best, Ken
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Saturday, October 15th, 2016 AT 12:00 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
That would be a issue with the mode door actuator.
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Saturday, October 15th, 2016 AT 2:49 PM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
Hi again. Would you be able to tell me what part # I would need for the Blend door actuator for my 09 Corolla?
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Wednesday, November 30th, 2016 AT 11:26 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Sure I found one right here on Amazon for $191.00

https://www.amazon.com/gp/product/B01BDWOCVQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=2carprcom-20&creative=9325&linkCode=as2&creativeASIN=B01BDWOCVQ&linkId=f8dea4553ab85fe4dafe7bdce69eaac0

Let me know how it turns out.

Best, Ken
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Wednesday, November 30th, 2016 AT 11:54 AM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
That part does not fit my vehicle according to the fitment chart. Also another link you sent me how to change the actuator is a much smaller part.
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Wednesday, November 30th, 2016 AT 11:58 AM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
This is from the link sent to me?
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Wednesday, November 30th, 2016 AT 12:01 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Look under the dash in the middle for a cable going to a mode door. Then operate the mode door knob while watching it. It doesn't just a OT about the AC on that car on our repair information we use. But looks like it might be cable operated.
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Wednesday, November 30th, 2016 AT 1:14 PM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
Sorry but in layman's terms? OT? Please explain. Thank you
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Wednesday, November 30th, 2016 AT 1:25 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
That was a type O I was trying to just say it doesn't give much information on the AC of your car in the repair information we use on this site.
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Wednesday, November 30th, 2016 AT 7:00 PM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
Ok. Lol I've taken it to a garage. Thanks for all your help!
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Thursday, December 1st, 2016 AT 5:16 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Keep us posted on what they find so we can help other users.
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Thursday, December 1st, 2016 AT 7:16 AM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
I will, thank you
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Thursday, December 1st, 2016 AT 7:20 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Hey,

Did you ever get the problem fixed?

Best, Ken
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Wednesday, December 21st, 2016 AT 6:08 PM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
Yes and no, the mechanic couldnt find the actuator, however they did switch the heater manually so that at least I have defrost on the windows until they can find where the actuator actually is located.
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Thursday, December 22nd, 2016 AT 5:33 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Hey LJCALLES,

I found this location diagram for you maybe you can print it and give it to the garage so they can see where the actuator is.

Best, Ken
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Thursday, December 22nd, 2016 AT 12:20 PM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
Thank you, I will print it out for them.
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Thursday, December 22nd, 2016 AT 12:48 PM
Tiny
LJCALLES
  • MEMBER
  • 16 POSTS
What part number do you think it may be?
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Thursday, December 22nd, 2016 AT 12:51 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
That I don't have, you would have to call the dealer and ask them.
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Thursday, December 22nd, 2016 AT 1:08 PM
Tiny
LUTHARTHEGREAT
  • MEMBER
  • 5 POSTS
  • TOYOTA COROLLA
Hello,
I have a 1999 Toyota Corolla 4 cylinder 3 speed auto transmission with around 112,000 miles.
This thing will run you out in zero weather when you use dash or floor or combination. As soon as you turn it to defrost, it kicks the AC on ( I know this is normal in order to remove moisture from the cab) the thing will start blowing cold air out vents. Turn it back to dash or floor and it will take 3 min to become hot again. I replaced the thermostat and flushed the cooling system to ensure it is good. I ran the engine to get it to cycle the engine fan and it cycles fine and coolant apears to be circulating fine. I touched both inlet and outlet to heater core and they are hot to the point you cant hold them very long.
Im not sure what to check next. Is there a ambient temp sensor that senses outside air in order to control the AC on heat? Anyone have any ideas?
Thanks in advance.
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Friday, January 3rd, 2020 AT 4:21 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
You need to get under the dash and check the operation of the blend door, it may be binding. This balances the hot and cold air entering the car.
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Friday, January 3rd, 2020 AT 4:21 PM (Merged)

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