Question about 2003 Mercury Mountaineer

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2004 Mercury Mountaineer-Horrible smell coming from AC/Heat system....does not smell like coolant.......I have had chipmunks in the engine compartment. Is there an outside air inlet with a dead chipmunk?

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  • Mercury Master
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This is not good. Your problem is worse than the Squirrels that put Walnuts in my A/C ducts and shorted my controls. The critters can chew holes in the plastic vent covers to gain access.

Your critters could have pooped and peeed in your Ductwork. This may be covered by your Comprehensive Insurance as it is a Health Hazard. Call your Agent, really, call your Agent.

I believe your Series of vehicle has an In-cabin Airfilter. This may help. Ford does carry products to Sterilize the A/C ducts which will help. Although the products were intended for Mold and things growing in the Ducts.

A dead Chipmunk is a possibility. So is a cooked animal on the motor. Good luck on this, about all you can do is change the Incabin filter and decontaminate. A Dealer can take apart the ductwork and get to th heart of the matter.

Posted on Oct 06, 2010

  • mattjosh2 Oct 06, 2010

    Where exactly is the entry for said chipmunk.......I would like to take a look from outside in...before ripping out the dashboard to get at the vent/fan
    Thanks so much
    Paul

  • fordexpert Oct 07, 2010

    I would look at the screened plastic covers on what would be called the cowling. This would be the area between the bottom of the windshield and under the back of the hood. The wiper blades park close to them. There is a cavity there.

    Also look at any factory hole under the hood, on my truck the holes were adjacent to the hood latch U bolt. I had birds. With my hood closed, they flew under hood, built a nest, hatched eggs, and the young bald birds were chirping because it was getting hot from the engine running. I was thinking it was the leaf springs squeeking and that the springs must have rusted terrible to cause that noise.

    Well, this time I put the truck in the garage and turned off the motor. The engine was off and the truck was not moving, but it still squeeked. I heard the noise from the front of the truck and opened the hood. Under the bottom of the hood where there are stamped X's and body contour there was a birds nest. The nest was sandwiched inside the hood.

    So check all openings, look for twigs and fur and plastic. They could be close to the catalytic converters on the frame rails. Basically you are looking for something similar to a rats nest that is close to a heat source.

    If you go to Servall, an A/C supply firm, there are several products made for house ductwork. Can't say how you would mount the stuff, but there are odor eliminating products.

    If the engine is cold and you have a cat, it might sniff out the location of the nest for you. Do not know any other way to locate it.

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