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Old 03-13-2011, 01:20 PM
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Jeep makes popping noise?

So i've noticed for about a week now that whenever I unlock my jeep, or turn the fan completely off, it makes a popping noise from the vent area. It sounds as if there's a vent door closing to keep the air from coming in. Any ideas on what this would be?
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Old 03-14-2011, 01:10 PM
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Bump. Any ideas why it would make that noise?
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Old 04-10-2011, 09:22 PM
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Re: Jeep makes popping noise?

Hello.
I have the same Grand Cherokee as you but only in black. Recently I've been hearing the same exact noise that you have been hearing and also when I turn off the fan, unlock my jeep or just open the door. Have you been able to find out what the problem is? Any help would be appreciated. You can email me at ajp0001@aol.com. FYI - Those are zero's in my email and not the letter o. Unfortunately sometimes I don't get emails because of that . Thanks very much!
Sincerely,
Andy
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Old 04-10-2011, 10:26 PM
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Re: Jeep makes popping noise?

Quote:
Originally Posted by tydallas View Post
So i've noticed for about a week now that whenever I unlock my jeep, or turn the fan completely off, it makes a popping noise from the vent area. It sounds as if there's a vent door closing to keep the air from coming in. Any ideas on what this would be?
Vent door is broke. Off to the dealer.


Had that happen with my old 5.7.
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Old 04-10-2011, 11:04 PM
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Re: Jeep makes popping noise?

What did they end up having to do to fix it? Mine isn't covered under warranty so I don't want to be charged an arm and a leg for them to repair it!
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Old 04-10-2011, 11:07 PM
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Re: Jeep makes popping noise?

From what I recall the whole dash had to come out for them to fix it and replace the tiny little blend door.
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Old 04-11-2011, 05:09 AM
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Re: Jeep makes popping noise?

Robert,
What do you mean by blend door? I thought the noise might be the vent door that closes off the air flow from outside. Is that by chance what the blend door does? After my lease was up I decided to buy it and I also bought the extended warrenty. I'm really glad I did. Thanks. Andy
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Old 04-12-2011, 05:41 PM
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Re: Jeep makes popping noise?

The blend door is in the center section of the HVAC box. Generally speaking, the actuator is the root cause of the problem, causing the door to come up against the stop, with the motor forcing still, and breaking the shaft of the door. Some of the doors are operated by the actuator, which has a gear that is plastic. If it is the FRESH AIR door, that is behind the glove box door. Remove the door and inspect the drive actuator. You shoild see a plastic gear on the drive side of the actuator. Actuate the door via the control head, and watch the movement of the gear. If the gear pops, that is the cause of the noise. Under warranty, not a major issue. If cash job, they will bill the cost of the Fresh Air Door and Housing, because the gear is not available separately.

MM
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Old 04-13-2011, 09:04 PM
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Thanks for the info! I'll def have to take a look at it
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Old 04-14-2011, 02:14 AM
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Re: Jeep makes popping noise?

Thanks guys for the help!!
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