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post #1 of (permalink) Old 11-19-2018 Thread Starter
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Front window defrost

Hello this morning I went to my car 2013 Chevrolet impala, and it was colder out and started the car while I scraped off the windshield and turned on the heater and put it on the front window defrost, after scraping the windshield I got in the car and noticed there was no heat coming from the front window defrost but you can hear the blower motor is working and the car was getting warmer but not coming out of the front windshield setting
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post #2 of (permalink) Old 11-19-2018
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May suspect mode (vent) actuator.
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post #3 of (permalink) Old 11-19-2018
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i just ran into this issue myself. to help troubleshoot which actuator is the culprit you'll need to play with the controls a little. does the air switch from defrost to head to floor as intended? do you get a clicking or tapping noise when you move the temp controls? if so which side seems to be doing the noise? the drivers or the passenger side?

i had a drivers side fail then a passenger side fail within 2 weeks of each other recently. the parts were only 20-25 each on rockauto for the heat blend door actuators, but i didn't have time to deal with the repair so i took it in to the shop.

this is a common issue with these cars, and there are many posts regarding the actuators failing. there are even a couple of decent youtube videos that show you how to repair them. if you need further help let us know.
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post #4 of (permalink) Old 11-19-2018 Thread Starter
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I found a old post that also had a 2013 Chevrolet impala and you pull the display fuse under the hood wait 5-10 minutes and then start the car and now it works normally.
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post #5 of (permalink) Old 11-19-2018
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Congrats on the reboot! Did you pull it with the car running or off?
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post #6 of (permalink) Old 11-19-2018 Thread Starter
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Pulled it with the car off is that the right way to do it
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post #7 of (permalink) Old 11-19-2018
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Due to reading some old threads about recalibrating/resetting the hvac system/actuators, I pulled it with the key off, with the eng. running and with the key turned to the on/run position (eng. off) to try to reboot lh and rh temp. actuators. Didn't work for me. I ended up replacing both bda's, lol.
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post #8 of (permalink) Old 11-20-2018
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Quote:
Originally Posted by xtremewhite99 View Post
Hello this morning I went to my car 2013 Chevrolet impala, and it was colder out and started the car while I scraped off the windshield and turned on the heater and put it on the front window defrost, after scraping the windshield I got in the car and noticed there was no heat coming from the front window defrost but you can hear the blower motor is working and the car was getting warmer but not coming out of the front windshield setting
As Sheila noted, this is the vent selector aka mode actuator. If resetting it doesn't work, you'll need to replace it. The part number I have is 22754989 , which is different than the other 3 HVAC actuators.

It's located above the passenger side blend door actuator. You get to it thru the left end of the glove box. As I recall, it's a pain to get at, but it's do-able without dismantling the entire dash.

HTH.

Doug

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post #9 of (permalink) Old 11-20-2018
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The RH Blend motor and the Mode motor are the easiest to change.
Pull the glovebox completely out of the dash. There's not loads of room but there's enough... and you don't have to stand on your head.


Even the LH blend motor isn't that bad once you take the beauty covers off the bottom of the dash above the pedals.

The Fresh-air/Recirculate motor is the one that's truly terribly awfully nasty to do.

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"Speed never killed anyone. Suddenly becoming stationary... that's what gets you." Jeremy Clarkson
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post #10 of (permalink) Old 12-04-2018 Thread Starter
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This morning the car did the same thing again
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post #11 of (permalink) Old 12-04-2018
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Quote:
Originally Posted by xtremewhite99 View Post
This morning the car did the same thing again
Let me recap to make sure I have this correct.

You have not replaced the vent selector actuator (aka, mode selector), correct?

Previously, to get it working, you got it to do a re-learn by pulling the fuse?

Have you tried doing that again?

I'm thinking you may have a bad actuator. But, before replacing it, I would remove it and try moving the shaft by hand / with pliers. You want to determine if perhaps the shaft is extra difficult to turn causing the actuator to stall. One cause of this might be crud buildup in the system as might be caused by spilling a soda down the vent. That's far fetched, but not impossible

Lastly, there could be something going wrong in the AC controls causing them to lose track of the actuator's position.

I'd bet on a bad actuator. For 40 bucks, an hour's time and some cussing, you can replace it. That may not fix it, but it's the easiest/cheapest thing to change (versus cleaning the ducts/dampers or replacing the AC controls)

To be clear, it's the most likely cause. But turning the vent selector shaft by hand will help isolate the cause.

Also, while there, you can manually turn it to defrost and leave it there, or put it on half defrost/half floor. Either way, with winter almost here, those are the best choices if you have to pick one spot.

HTH.

Doug

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Last edited by plano-doug; 12-04-2018 at 01:19 PM.
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post #12 of (permalink) Old 12-04-2018 Thread Starter
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I get heat and there is no clicking sound like I have seen in videos it is just like the air doesn't know which setting to go thru
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post #13 of (permalink) Old 12-05-2018 Thread Starter
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When I put the heater on defrost on the front windshield the air is blowing towards the floor of the car
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post #14 of (permalink) Old 12-05-2018
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I'd suggest either rebooting again by pulling the 10amp display fuse or replacing the mode (vent) actuator.

Last edited by sheila; 12-05-2018 at 08:45 PM.
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post #15 of (permalink) Old 04-06-2019
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Did you end up finding a fix for this? I have a 2013 LTZ 3.6 with the same exact problem.
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