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We have an '07 Chrysler T&C. This problem started a few days…

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We have an '07...

We have an '07 Chrysler T&C. This problem started a few days ago. After you've driven some 10 miles, and come to a stop and shift into park, after a few seconds it sounds like a motorcycle passing behind the vehicle. I'm not kidding. The first time it did it, my wife and I were stopped at our mail box, and we both looked behind us at the road, expecting to see a motorcycle that had gone past. It only does it for a few seconds, each time. I've been a Ford Service Manager, a GM Service Manager, plus I've owned my own auto body shop and used car lot, and I've NEVER heard a noise like this in a vehicle. By removing panels and many test drives, I've determined the noise is coming from the rear A/C unit. It's non-electrical, as it does it with all power harnesses unplugged from the rear air unit. However, it will not do it if the A/C is turned off completely from the front panel. A technician at a local NAPA shop who replaced the evap core in it last spring (and who worked for me in a different situation) suggested the blend door motor. But it makes the noise even with the blend door unplugged. All of the ducts have been removed, so it's not simply duct rattling. The bottom line is, it sounds like a huge woodpecker in the unit for a few seconds, intermittently. I'm stumped.

Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has this been going on?

From somewhere in the rear A/C unit, and it's been doing it for several days.

Mechanic's Assistant: What is the model of your '07 Chrysler?

T&C.

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

I've removed upholstery panels and ducts down to the basic rear A/C unit, and tried unplugging the main power line to the unit, plus unplugging the blend door motor. It only will not do it when the entire A/C system is shut off from up front. It appears to be a non-electric problem within the unit.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Not really, except the rear evap core was replaced last spring and the entire system serviced.

Submitted: 9 months ago.Category: Chrysler
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Answered in 7 hours by:
8/3/2017
Chrysler Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems replied 9 months ago
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems
Category: Chrysler
Satisfied Customers: 5,358
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic Vehicles .
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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Chrysler Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems replied 9 months ago

Hey how are you

That is a good one .lol

So it sound like a Rush of air ,DOES IT DO IT ONLY WHEN THE CAR IS MOVING OR NOT ?

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

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Chrysler Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems replied 9 months ago

REAR UNIT

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Customer reply replied 9 months ago
When the vehicle is stopped. A couple of times it did it when moving. Mostly when you come to a stop.
Chrysler Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems replied 9 months ago

did you check the rear blower blades for one being broken, pull blower out any obstructions any passage

I never heard of that to be honest with you

Put a person in rear and let him be close to unit and drive and see where is noise coming from

are you sure not a rear end issue and sound traveling ,but us aid only when ac blower rear unit is on correct

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Chrysler Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems replied 9 months ago

you still need help

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Chrysler Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems replied 8 months ago

You are very welcome :)

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