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  • May 25, 2019, 03:57:34 PM

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Author Topic: Heater Box Buzzes  (Read 135 times)

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Offline MIPS

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Heater Box Buzzes
« on: April 05, 2019, 12:55:23 AM »
Whenever the car is at cruising speed and the cold air vents are closed, the heater box makes a buzzing sound like a reed buzzing. All it takes to make it go away is to open the cold air vents a little, or slide the vent control to OFF.  Part of me thinks it's one of the box seals coming apart but I can't think of much else that could cause the racket but it's amazingly annoying.

Offline maddog

  • a long haired redneck country boy
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Re: Heater Box Buzzes
« Reply #1 on: April 09, 2019, 02:37:23 AM »
I had a similar issue with my wagon and it turned out to be some leaves stuck inside the vent doors.

Offline TheBirdman

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  • that noise? that ll go away.
Re: Heater Box Buzzes
« Reply #2 on: April 09, 2019, 10:57:08 AM »
For the first few months my heater vents had a distinct aroma of hantavirus, so I really should eventually take the heater box apart to clean out what is almost certainly a mouse nest. Confounded rodentia.
83 eagle wagon 4.0

Offline MIPS

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Re: Heater Box Buzzes
« Reply #3 on: May 12, 2019, 12:22:58 AM »
Well now I've REALLY done it.
The heater box is sealed with sticky backed foam tape but in nearly 40 years it has perished and left behind the plastic ribbon the adhesive backing is on. THAT is the culprit for the buzzing. The seal on the passenger side vent flap in particular was making the noise and trying to pull the plastic out has caused it to sound EVEN WORSE.
Looks like I'm just gonna have to pull the whole box out and regasket it.


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