W220 Front heater blowing cold
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Newbie
Joined: May 2016
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2002 W220 S500
W220 Front heater blowing cold
Right this is an odd one, my front heater was blowing cold tonight even though it was on HI, but as it’s a LWB I’ve got rear heater controls & that one is blowing lovely & hot, so can’t work out why one blows cold & the other hot ???
Any clues please.
Cheers
Ken
Any clues please.
Cheers
Ken
MBWorld Fanatic!
Joined: Dec 2012
Posts: 2,474
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From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
Post #4 in this thread:
http://www.benzworld.org/forums/w220...-behavior.html
http://www.benzworld.org/forums/w220...-behavior.html
Member
Joined: Sep 2017
Posts: 162
Likes: 18
2006 S430 AMG
I seem to have a similar issue, I did notice that switching the "Auto" Setting on the middle vent helps. I moved it to setting below it which disables the red light.
I think this issue is one I can live with though, I still get the heat from the sides (in time) and it does take longer to be comfortable......not a big deal, I'm already dressed for the weather regardless. Maybe something I will consider fixing down the line.
I think this issue is one I can live with though, I still get the heat from the sides (in time) and it does take longer to be comfortable......not a big deal, I'm already dressed for the weather regardless. Maybe something I will consider fixing down the line.
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MBWorld Fanatic!
Joined: Dec 2012
Posts: 2,474
Likes: 439
From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
If you notice, in daily driving the engine rarely gets over 1500rpm for any length of time. At these low speeds, the engine water pump doesn't move enough coolant thru the heater core to keep you warm. The small pump on the duo-valve adds enough flow to make a difference.
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Thread Starter
Newbie
Joined: May 2016
Posts: 11
Likes: 0
2002 W220 S500
I seem to have a similar issue, I did notice that switching the "Auto" Setting on the middle vent helps. I moved it to setting below it which disables the red light.
I think this issue is one I can live with though, I still get the heat from the sides (in time) and it does take longer to be comfortable......not a big deal, I'm already dressed for the weather regardless. Maybe something I will consider fixing down the line.
I think this issue is one I can live with though, I still get the heat from the sides (in time) and it does take longer to be comfortable......not a big deal, I'm already dressed for the weather regardless. Maybe something I will consider fixing down the line.
I suppose it depends whereabouts you are in the USA as to how urgent it is for you, Florida or LA not so urgent, but Minnesota, Dakota etc would be a different story
Member
Joined: Sep 2017
Posts: 162
Likes: 18
2006 S430 AMG
Between 0-10 degrees F past week or 2.
