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Old 01-18-2011, 09:45 PM   #1 (permalink)
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Hey All,

I am just curious if anyone had this same issue. I was driving today and my windows were getting fogged so I turned on the window front defrost. I noticed almost immediately it started making a humming noise and would only stop when I accelerated a bit faster. As soon as I came to a stop, there it was once more. I had many cars and used the defrost system plenty and never heard this loud noise which almost makes the car sound like its dying.

Anyway tomorrow the car is going in for service and I have a few issues they better fix.

1. front driver seat cushion is making a major squeaking noise, I read somewhere they can replace the cushion.
2. the front instrument panel or gauges makes a vibrating noise between 1000 - 2000RPM's
3. the front passenger side I noticed when I hot a bump something is rattling, sounds like its coming from behind the glove box.

if there is anyone with the same issues or had these problems fixed please let me know. I could use all the info I can get to bring with me tomorrow.


Thanks,
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Old 02-08-2011, 09:00 AM   #2 (permalink)
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Last night I noticed the buzz/hum from my rear defrost. It only did it while the car was stopped idling. When I accelerated it seemed to go away. Did you ever ask the dealer about it?
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Old 02-08-2011, 09:57 AM   #3 (permalink)
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There is nothing about the rear defrost in a Sonata that should be humming - it's like a heater coil in your rear glass and there is no blower. You must have heard something else.
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Old 02-08-2011, 10:10 AM   #4 (permalink)
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Where are people hearing this "humming"?
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Old 02-08-2011, 10:18 AM   #5 (permalink)
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Live1 says his was in the rear defrost. NOT!!!!
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Old 02-08-2011, 10:28 AM   #6 (permalink)
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QUOTE (lsutton5144 @ Feb 8 2011, 09:57 AM)
Quote:
There is nothing about the rear defrost in a Sonata that should be humming - it's like a heater coil in your rear glass and there is no blower. You must have heard something else.
+1 Nothing there to make any type of noise.
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Old 02-08-2011, 11:21 AM   #7 (permalink)
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QUOTE (SE2011 @ Jan 18 2011, 09:45 PM)
Quote:
Hey All,

I am just curious if anyone had this same issue. I was driving today and my windows were getting fogged so I turned on the window front defrost. I noticed almost immediately it started making a humming noise and would only stop when I accelerated a bit faster. As soon as I came to a stop, there it was once more. I had many cars and used the defrost system plenty and never heard this loud noise which almost makes the car sound like its dying.

Anyway tomorrow the car is going in for service and I have a few issues they better fix.

1. front driver seat cushion is making a major squeaking noise, I read somewhere they can replace the cushion.
2. the front instrument panel or gauges makes a vibrating noise between 1000 - 2000RPM's
3. the front passenger side I noticed when I hot a bump something is rattling, sounds like its coming from behind the glove box.

if there is anyone with the same issues or had these problems fixed please let me know. I could use all the info I can get to bring with me tomorrow.


Thanks,
When I hit the front defrost, it kicks the fan up from 1 bar to 3 bars automatically, is that possibly what you're hearing, the difference in the fan speed ?
Also,
The Glove Box is a known rattle, there's a pdf floating around on wear to put felt pads, basically inthe little door jamb that makes the door tight and snug....I need to get some black ones at Home Depot next trip !
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Old 02-08-2011, 02:38 PM   #8 (permalink)
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Hey Larry Sutton! I am fully aware that there is NO fan in the rear defrost and it is DEFINITELY when the rear defront is on (noise went away when I truned it off). It is a humming (almost electrical like sound) coming from the rear of the car. If you don't have any helpful feedback, move on!


QUOTE (lsutton5144 @ Feb 8 2011, 11:18 AM)
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Live1 says his was in the rear defrost. NOT!!!!
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Old 02-08-2011, 03:02 PM   #9 (permalink)
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QUOTE (Live1 @ Feb 8 2011, 02:38 PM)
Quote:
Hey Larry Sutton! I am fully aware that there is NO fan in the rear defrost and it is DEFINITELY when the rear defront is on (noise went away when I truned it off). It is a humming (almost electrical like sound) coming from the rear of the car. If you don't have any helpful feedback, move on!
Live1,
Chill out dude. No one could tell from your initial post what kind of humming noise you were hearing. You said you were hearing a buzz/hum from the rear defrost. After some of the things I've seen posted on this site, there's probably some folks out there that think there's a blower in the back and how was I to know you weren't one of them! Then Bearcats wanted to know where people were hearing this humming, so I repeated that you were hearing it from the rear defrost. I don't see anyone agreeing with you that it's possible for the rear defroster to buzz/hum. Perhaps it's a switch or relay for the unit that is in the dashboard that you are hearing.
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Old 02-08-2011, 03:12 PM   #10 (permalink)
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Not looking for anyone to agree just using the forum how it is intended to be used. Feel free to stay put and keep whistling your song and I will move one....



QUOTE (lsutton5144 @ Feb 8 2011, 03:02 PM)
Quote:
Live1,
Chill out dude. No one could tell from your initial post what kind of humming noise you were hearing. You said you were hearing a buzz/hum from the rear defrost. After some of the things I've seen posted on this site, there's probably some folks out there that think there's a blower in the back and how was I to know you weren't one of them! Then Bearcats wanted to know where people were hearing this humming, so I repeated that you were hearing it from the rear defrost. I don't see anyone agreeing with you that it's possible for the rear defroster to buzz/hum. Perhaps it's a switch or relay for the unit that is in the dashboard that you are hearing.
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