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Has anyone or does anyone know why when the car is first started after setting for a while the light on the control knob for the rear defroster blinks? After it stops then the Air Conditioner light and the Circulating air light then comes on.

I have been having problems with the Air Conditioning getting cold for weeks now and this problem serviced with the blinking light a few days ago.

Is the blinking light a code checking system?

Thanks

Joe
 

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Reviving this old thread. This just started happening on my '13 RT. What was the end result of this issue for you?
Hi Shedweller57,

If you need to utilize the dealership, I'm happy to help facilitate an appointment and work with the dealership to resolve your concern.

Kori
Dodge Social Care Specialist
 

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I believe the blinking defrost light, followed by the others is the HVAC calibrating the vent blend door. Some have had luck with putting all controls to off position, disconnect battery for a while, hook it back up and fixed.

A Guy

EDIT: Found a post. @Nuke needs a beer

http://www.challengertalk.com/forums/f38/flashing-defroster-light-124498/#post1975866
Correction: Nuke wants a beer, yes, but that doesn't necessarily mean that Nuke needs a beer.

I know, that's nothing but semantics to most folks, but it truly is a distinction I have found I need to make sometimes...like if I don't want it being used against me later on down the road by some over-zealous, hot-shot assistant DA who's trying to make an example of someone and has his sights squarely set on me as the person with whom he shall attempt to example-ize.

Actually, if I had my drothers, I'd ruther have a can of beef jerky snuff...teriyaki flavored!! And not that cheap-assed, chunked-up, mass-produced stuff either, I'm talking about the old-school kind that was thin as angel hair so you could keep a dip of it in your lip for an hour or two.

Yeah, that was some good shiznit, too bad you can't hardly find it anymore...probably got bought up and moved over to China to save a few pennies per roll...dang trade deficit taking all my good beef jerky snuff...

<mumble, mumble>

...back in my day...

<grouse, grouse>

...ain't like it used to be...


Wait, what were we talking about???
 

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Man, sounds like you need a beer my friend >:)

A Guy
 

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Try this.



a. With the vehicle running, set the HVAC blower to low.

b. Press and hold the recirculation button on the HVAC control head for 10 seconds, then release.

c. Now press and hold the recirculation button on the HVAC control head again until the recirculation LED begins to flash, then release the button.

d. The system will perform a brief recalibration.
 

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Man, sounds like you need a beer my friend >:)

A Guy

WP_20170219_22_15_40_Pro (2).jpg

I am quite sure that over the course of my entire life up until now, there was at least one or maybe two times when I was as content and just generally as happy as I am right now...but you know what, for the life of me, I cannot seem to recall any specific instances....

So right now is my new official champion!!

WOO-HOO!!

Now if you'll excuse me, I'm gonna take my one bottle of beer, two cans of jerky snuff, and black Dodge Challenger somewhere more amiable to song writing, cause I have a sudden, overwhelming urge to pen a country song using just those 3 ingredients...
 

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I tried your calibration technique number40fan, where did you come across this and what year is your challenger? Having little luck on my '11 challenger.
 

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Maybe a fix

I took my 2014 Challenger R/T in for the alternator recall and when I got the car back I had the problem with the defroster light blinking, so I took it back to the dealer.

I was told by the dealer that the recirculation door had a malfunction. I found out where the actuator was and took the screws out that held it in and found no problem with unit. I had the actuator in my hand still wired up and turned on the car and activated the system to see if there was a problem with it or the flapper, found none, and made sure that the unit ran through a few cycles turning the switch on and off to set it so I knew where the flapper should be and reinstalled the actuator. Then with the ignition off I pulled the 2 fuses that operate the climate control system and made sure the switches were in the default settings (blower- off, blend and mode in the 12 o'clock position) and reinstalled the fuses. When I started the car, I did not touch any controls until the Climate Control went through it’s diagnostics by flashing the rear defrost light until it went out on its own, then I set the control knobs where I wanted them and the blinking light has not come back but I’ll keep an eye out for it. Maybe this helps someone, I don't know if it works on all the Challengers or not but it worked for me so far and I'm keeping my fingers crossed.
 

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I took my 2014 Challenger R/T in for the alternator recall and when I got the car back I had the problem with the defroster light blinking, so I took it back to the dealer.

I was told by the dealer that the recirculation door had a malfunction. I found out where the actuator was and took the screws out that held it in and found no problem with unit. I had the actuator in my hand still wired up and turned on the car and activated the system to see if there was a problem with it or the flapper, found none, and made sure that the unit ran through a few cycles turning the switch on and off to set it so I knew where the flapper should be and reinstalled the actuator. Then with the ignition off I pulled the 2 fuses that operate the climate control system and made sure the switches were in the above settings (blower- off, blend and mode in the 12 o'clock position) and reinstalled the fuses. When I started the car, I did not touch any controls until the Climate Control went through it’s diagnostics by flashing the rear defrost light until it went out on its own, then I set the control knobs where I wanted them and the blinking light has not come back but I’ll keep an eye out for it. Maybe this helps someone, I don't know if it works on all the Challengers or not but it worked for me so far and I'm keeping my fingers crossed.
Took my Challenger in for the T-36 Alternator Recall today. When I picked it up from the dealer, the AC would not work. Only blinking lights! Un-hooked battery and followed your instructions. After resetting, all works fine! Thank You
 

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One for the books

I don't know if the fix will work for all platforms but I figured I would at least pass on what I figured out. Of course the Dealer wouldn't take responsibility for the problem but found through this and other forums that it's a common problem when they do the recall. I sure as hell wasn't going to pay them to fix a problem that they created.
 

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Still no problem

Well it's been 7 months and the problem has not came back. It would have been nice if the dealer had taken responsibility for the problem they created. Now if I have to take my car to the dealer for anything I can't fix, I know to put it the climate control in default mode.
 

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Well it's been 7 months and the problem has not came back. It would have been nice if the dealer had taken responsibility for the problem they created. Now if I have to take my car to the dealer for anything I can't fix, I know to put it the climate control in default mode.
Well hopefully you have done something useful with all that money you’ve saved that would have been spent paying someone else to fix the initial problem. Charitable donations to international humanitarian organizations is a good option, as is buying needed supplies for a local animal rescue.

A third, slightly less popular option is to send any extra money to me. I can’t promise I will use it for good, and in fact, it’s highly likely I will squander it. However, you can rest assured I will have a blast while spending it.

Of that, you can be sure!!
 

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Older thread I know, but this trick just worked for me as well. Thanks Nuke!
 

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Daddigyrl, I didn't put the system in Defrost mode I put it in Default mode. Default is with the blower switch in the off position, and the other 2 switches at the 12 o'clock position each.
 

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Hello, I am also experiencing this same issue . I tried disconnecting the negative battery cable while the knobs where at default position but only worked temporarly (about a days or so) Today the issue is back that blinking light on startup for 20 seconds then it all works fine . Please any other suggestion? Here it talks about pulling fuses? What fuses exactly ?
 
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