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Loud clicking noise when turning off heater/AC

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Old 05-16-2010, 03:23 AM   #1
SamTheMan
 
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Default Loud clicking noise when turning off heater/AC

On my 2005 Mustang GT, I noticed that nearly every time I turn the right Heater/AC **** (vent choice ****) from windshield, windshield/foot, or foot (so basically from right) to off, I get 4-5 very loud, fast clicking noises. There is no other problem with the car that I can feel or see and I cannot duplicate the sound every single time. But I would say it happens about 75% if the time.

If this is any help, it is possible the sounds started after installing an aftermarket head unit in the car (AVIC D3). I'm not positive it was due to the head unit, it just seems to be around the same time.

I am wondering if anyone else is having this problem and if there is any way to fix this.

Thanks in advance for any help.
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Old 05-16-2010, 03:56 AM   #2
SteveB_RET
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Got a question for you.... Did the head unit have NAVI and did it come with a magnetic antenna that u stuck to the metal frame under the dash????? What you are hearing is a Mode Door Actuator and mine started making noise after installing my new Head unit also... It does not do it all of the time but I stuck the NAVI antenna under the dash and I am beginning to think that I stuck it close to an actuator and the magnetized antenna is causing the problem........
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Old 05-17-2010, 12:09 AM   #3
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Well it did come with navigation, but I routed the antenna to the back of the car. I'm only an amateur with cars and I have no idea what a actuator is, but what else could be cause it to make this noise? It is annoying to hear this noise every time I defrost the front windshield...
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Old 05-17-2010, 01:47 AM   #4
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My car had the same problem but only when the key cycled. The noise is from a damaged HVAC actuator. Had 34k miles on it so it was covered by ford warranty.
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Old 05-17-2010, 02:39 AM   #5
SteveB_RET
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SamTheMan, when you turn the **** from window defrost to floor or to the dash vents, vent doors open and close electronically. There are several inside the dash. One of them is making the noise.
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Old 05-17-2010, 07:40 AM   #6
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^^^^cORRECT
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Old 05-18-2010, 08:11 AM   #7
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I appreciate all the help guys. I guess I'm gonna have to take it to the dealership.
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Old 05-18-2010, 08:41 AM   #8
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Had the same problem fixed at dealership recently. It was one of the blend doors.
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Old 05-18-2010, 10:17 AM   #9
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Blend door actuator. I wish one of you guys would actually get the PART NUMBER when you get it replaced. I think there are 2 under the dash. One near the glove box, and one near the center of the dash....I'm guessing all the issues are with the center one, and that's the one that is messed up on mine, I just want to be able to go to the dealership with a part number.
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Old 05-19-2010, 12:11 AM   #10
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Part Number
5F9Z-19E616-EA

Here you Go =)
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Old 05-19-2010, 09:41 AM   #11
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My car just started doing it. How much is the part and how much did you pay to get it fixed? I'll probably do it myself if I can.
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Old 05-19-2010, 12:43 PM   #12
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Quote:
Originally Posted by n406c View Post
Part Number
5F9Z-19E616-EA

Here you Go =)
Woohoo!!! Thanks!
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Old 05-19-2010, 12:47 PM   #13
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What did it cost to get the actuator replaced?
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Old 05-19-2010, 01:59 PM   #14
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http://www.youtube.com/watch?v=dbE_6knb0vE

Just took a video of this, mine is doing the same thing... Only happens when I turn the car on.
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Old 06-03-2010, 03:20 PM   #15
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yep..same as mine. I have the part that the number above referenced to. It was about $20 I think....I haven't had a chance to take the dash out to replace it though, but will soon! It's annoying as crap!
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Old 06-03-2010, 03:47 PM   #16
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Your blend door is jumping the rack and the clicking is the result.
It probably has a lighter or some other foreign object that entered
thru the dash vent(s).
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Old 10-12-2010, 07:32 PM   #17
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Mine is doing the same thing. How hard is it to get to it? My happened after my warranty has expired.
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Old 11-30-2010, 08:57 AM   #18
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I still haven't had a chance to take the dash out to fix this...the part just stares at me when I walk in the door.....I keep hoping someone else will do this, and take some pictures of how to replace it. I haven't done enough research on how to get to the part, so I'm hoping someone else has. I'll get it eventually.
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Old 02-05-2011, 06:20 PM   #19
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Default Blend Door Repairs

Apparently you don't need to pull the dash apart; access through the glove box or driver's side footwell.

There are three of these.

Found this but haven't tried it yet: http://iihs.net/fsm/?dir=336&viewfil...20Actuator.pdf

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Old 02-06-2011, 09:38 AM   #20
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Look like a fairly easy fix to replace the blend door actuator if you can score the replacement part. There is known issue with the gear teeth breaking off causing what you describe. To verify it's the one in the post above, disconnect the connector and start up your car. If the noise is gone, that's the one.
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Old 02-06-2011, 09:38 AM
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ac, car, clicking, clincking, gears, heater, loud, make, motor, noise, noises, on, rapid, sound, switch, turning

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