cooling fan on all the time?
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Joined: Jul 2006
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cooling fan on all the time?
Don't know if this is normal or not, but as soon as I turn on the car, the cooling fan goes on and runs all the time, till I shut it off. Is this normal? I live in Vegas, and yes, its hot. Also the fan is extremely loud, sounds like the car is a airplane trying to take off or something?
Any thoughts?
Thanks
Ed
Any thoughts?
Thanks
Ed
MBWorld Fanatic!
Joined: Apr 2004
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From: Canada
2004 E500 / 2001 C240
I am sure this is normal. Here it is hot so it is on high the past week or so..
If it is too loud, you can adjust the fan on the console a couple down from the top setting and that will not sound as loud.
The reason it does that is to keep you, the owner of the car comfortable.
If it is too loud, you can adjust the fan on the console a couple down from the top setting and that will not sound as loud.
The reason it does that is to keep you, the owner of the car comfortable.
MBWorld Fanatic!
Joined: Dec 2003
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From: Sacramento
'08 AM Vantage V8 - '03 E500
The ultra-loud aux fan noise should quiet down on its own once you get moving, or at any rate you won't hear it much after you get moving (unless it's wicked-hot, like Death Valley hot). The very fast aux fan operation seems to coincide with "MAX COOL" in the climate control display - the four-zone climate control, anyway.
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Joined: Jan 2005
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From: Houston, TX
'05 E500
Uh, guys, he's talking about the cooling fans in the engine bay not the interior climate cooling fans.
Mine does the same thing, so I think it's normal. When you stand outside, the car is EXTREMELY loud. My parents' Lexus is almost totally silent, so I am wondering why MB can't make it the same way.
Mine does the same thing, so I think it's normal. When you stand outside, the car is EXTREMELY loud. My parents' Lexus is almost totally silent, so I am wondering why MB can't make it the same way.
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Joined: Apr 2004
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From: Canada
2004 E500 / 2001 C240
Originally Posted by FirstMB
Uh, guys, he's talking about the cooling fans in the engine bay not the interior climate cooling fans.
Mine does the same thing, so I think it's normal. When you stand outside, the car is EXTREMELY loud. My parents' Lexus is almost totally silent, so I am wondering why MB can't make it the same way.
Mine does the same thing, so I think it's normal. When you stand outside, the car is EXTREMELY loud. My parents' Lexus is almost totally silent, so I am wondering why MB can't make it the same way.
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MBWorld Fanatic!
Joined: Apr 2004
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From: Canada
2004 E500 / 2001 C240
Originally Posted by FirstMB
Uh, ok, the engine cooling fan is related to the interior cooling fan, ok 
The sound he is hearing (you are hearing) is related to the fan control in the car.
Last edited by ATS; Aug 1, 2006 at 11:18 PM.
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Super Member
Joined: Aug 2005
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From: Oregon
Harley-Davidson
Originally Posted by ATS
Uh, ok.. Before saying I am crazy.. Go try it brainiac. I expect you coming back in here with an icon that looks like this..
The sound he is hearing (you are hearing) is related to the fan control in the car.
The sound he is hearing (you are hearing) is related to the fan control in the car.
MBWorld Fanatic!
Joined: Apr 2003
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From: Bay Area
E500 Sport
I don't know if the 2 fans are related, BUT I have noticed the same correlation. Listen with your window open. When the A/C is on "max cool", that fan in the radiator area is extremely loud, as if an airplane is taking off. This IS quite embarassing as people in the parking lot look my way. Once I turn the fan speed down a couple of notches, the sound will soften.
MBWorld Fanatic!
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From: Canada
2004 E500 / 2001 C240
Originally Posted by cyclerider
I would seriously doubt this, but I'm no Brainiac.
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From: Ft. Lauderdale Area, USA
2015 ML 350
Originally Posted by tbone
I don't know if the 2 fans are related, BUT I have noticed the same correlation. Listen with your window open. When the A/C is on "max cool", that fan in the radiator area is extremely loud, as if an airplane is taking off. This IS quite embarassing as people in the parking lot look my way. Once I turn the fan speed down a couple of notches, the sound will soften.
Whenever the internal A/C controls are set so that the words "MAX COOL" are visible on the display, the radiator fan is turned on to its "airplane noise" speed/loudness. To achieve maximum cooling it is necessary to dump the most heat from the A/C condenser which is located in front of the radiator. That is done by drawing vast amounts of air over & thru the fins to pull the heat out of the A/C system refrigerant. If you dont pull all of the heat out & away from the coils the A/C will not cool the car interior. The interior heat from the car is absorbed by the A/C refrigerant & taken to the front of the car & must be dumped so that the refrigerant can go back into the car & pick up more heat.
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Joined: Apr 2004
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From: Canada
2004 E500 / 2001 C240
Originally Posted by cyclerider
Amazing, and very Germanic engineering. I should have guessed.
By the way, ATS, I owe you this :
By the way, ATS, I owe you this :
