Question about 2003 Acura MDX

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2003 Acura MDX -Rodent gets into the air conditioner front blower

This is the 4th time since I bought the car new. When I turn on my air conditioning something is making a sound (tap tap tap) and the blower sounds out of balance. In the past it appears to have been a mouse when I take it to the dealer. They say they can't do anything to inhibit access. I want to start removing the rodent myself if someone could tell me how to get to the blower. Thanks

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  • terry305 Dec 27, 2008

    I found a mirror to lay on the floor board on the passenger side to locate the blower housing (towards the right side behind the glove box with the back of the motor facing towards the floor). It was then obvious that 3 screws around the perimeter were holding the faceplate of this assembly in place (don't confuse with the screws holding the motor to the faceplate). I disconnected the wire harness by depressing the tab on the side of it. After removing the 3 screws the unit does drop down when it is in the right position. The mouse was laying in the cage. There is an alignment tab on the faceplate that will automatically align the screw holes when you reinstall. Cleaned the plastic fins and reassembled. Glad I didn't wait for the dealership on Monday. I used a T-20 torx bit to remove the 3 screws. They have a hex head as well but I didn't check the size.

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I've been hearing this same loud noise in my car for about 6 months or more, when I use my heater/AC blower. At high settings, it vibrates the whole dash! I did a little online Googling and found that sometimes leaves (and oth...er things) get into the blower, which is located down low under the glove box in a 2003 Acura MDX. I read that its fairly easy to remove the blower from its housing by climbing under there and removing some Torx screws, moving the wiring harnesses aside, and disconnecting the power supply connector.

Then today, I read this post, then tonight, I removed the heater/AC blower and... yep, you guessed it... a dead dessicated mouse, flattened out by the high RPMs of the blower spinning him around in my car for the last 6 to 8 months! After a propper burial, I re-installed the blower, and its smooth and quiet again, and hmmm I also think that my car has a more pleasant... ambiance now for some reason as well.

Posted on Mar 28, 2010

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This is easy just remove the plastic panel under the dash on the right side (kick panel) it just pulls off. then remove the wiring connector and tube from the blower motor and remove the three 8mm screws and pull the motor down to clean it out heres a picture of the location http://senduit.com/0274d6

Posted on Apr 03, 2009

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moz-screenshot.pngHere's an excerpt from the 2002 Acura MDX 4WD 6cyl Repair guide for replacing what the reference manual calls the "control assembly" - its located under the console rear trim and may (or may not)
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You may want to call your friendly Acura dealership ad speak to the parts department, to make sure where the blower resistor is located - or a visit to a dealership parts counter often (or
Advance Auto Parts is helpful too) ofen clarifies questions I have from Haynes manuals (the cheapest car repair guides).

All this assumes that you've correctly diagnosed your blower control problem -- as in "replace the blower resistor when the blower works only on the MAX/Highest setting."

-- begin excerpt from 2001-2 Acura 4wd 6cyl MDX Repair manual --
Control Assembly Removal & Installation

2001-02 Models
  1. Remove the console rear trim. Refer to the accompanying illustration.

    0996b43f80205cf3.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Exploded view of the console rear trim

  2. Remove the self-tapping screws and the rear heater-A/C control unit (A) from the console rear trim (B).

To install:
  1. Install the control unit in the reverse order of removal. After installation, operate the control unit controls to see whether it works properly.
  2. Run the self-diagnosis function to confirm that there are no problems in the system.

    0996b43f80205cf2.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Remove the self-tapping screws and the rear heater-A/C control unit (A) from the console rear trim (B)



  3. --- end excerpt from 2001-2 Acura 4WD MDX 6cyl Repair Manual ---

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Dec 11, 2010 | 2003 Acura MDX

1 Answer

2004 acura mdx. turn on air conditioner - no air blows from front. rear air blows, but not cool. cannot hear compressor coming on. checked fuses - they look okay.


I have the same problem with my MDX. I live in the Bahamas and there are no Acura dealerships here. I had two mechanics look at it and they could not fix the problem, so I took matters into my own hands. After checking for blown fuses I did a self diagnosis on the climate control panel, I got a DTC that related to a fault in the blower motor circuit. I went through the step by step diagnosis of the circuit and found that the blower motor was faulty. Acura's climate control has a couple sensor that monitor the blower speed, if the sensor do not detect that the blower is running they will not allow the compressor to run, in essence the rear blower will run but the system will not cool. You may need to replace the blower. The quickest way to check if the blower is faulty is to pull the connector off the blower, turn the iignition on and the ac system on, You should get battery voltage on the connector. If you have battery voltage at the connector and the fan doesn't run the youv'e solved the problem. If you don't have voltage at the connector with the ignition switch on and the ac system on you problem could be the front blower power transistor. If you need diagrams and how to retrieve self diagnostic DTC contact me: engineeredelectric@gmail.com

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I went to an Acura dealer to buy the transistor for the rear A/C unit. The service advisor told me that the problem with the front A/C was probably due to a defective front transistor / resistor. I bought that part too.

The front transistor is located next to the blower motor under the dash on the passenger's side. It is secured by three or four small bolts. The one on the bottom left is very close to the carpet and the most difficult to get off and put back on.

The rear transistor is located behind the carpeted trim panel on the center console (driver's side). The carpeted trim panel is secured by clips only - there are no screws, so remove it carefully starting at the side near the accellerator pedal. Once the panel has been removed, reach inside a small hole in the metal frame to access the rear transistor. It is removed by twisting it and pulling it out. The hole in the frame is small and you might find pliers helpful.

After replacing both parts, the front and rear A/C are working. Apparently these transistors are common failures. If the A/C is out in your Acura MDX and the fuse checks good, a new transistor will likely solve your problem.

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