Heat from the center vents
Thread Starter
MBWorld Fanatic!
Joined: Jun 2005
Posts: 1,047
Likes: 2
From: So. Cal
S6 LP640 E500
Heat from the center vents
My 2004 e500 has hot air not blowing but emitting out from the center vents even with the climate controls all off. It's been pretty warm here in Cali and going to reach near 90 degrees this weekend, anyone know what I can do?
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,017
Likes: 16
From: Ft. Lauderdale Area, USA
2015 ML 350
Thats how it works. It always passes outside air into the cabin. If its hot out the air will be warm coming thru the vents A/C compressor should always be on.
Member
Joined: Jun 2007
Posts: 129
Likes: 0
From: Bethesda, MD
2003 E500 Sport, 1995 SL320
the heater core change-over valve is most likely stuck open (allowing hot engine coolant to flow into the heater core and heat up the incoming air). when you turn on the AC, the cold air produced overpowers the heat so it seems like nothing is wrong again.
(check out #30 in the attached photo - its MB part# A 211 832 00 84 and was replaced with the updated part# A 211 832 05 84)
if my memory serves me correctly, there might even be a DTB about it somewhere
(check out #30 in the attached photo - its MB part# A 211 832 00 84 and was replaced with the updated part# A 211 832 05 84)
if my memory serves me correctly, there might even be a DTB about it somewhere
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Senior Member
Joined: Mar 2011
Posts: 396
Likes: 1
From: SF Bay Area
2004 E500
did you get it fixed? I seem to have the opposite problem. all I get is cold air, even if I crank up the temp to 80 degrees. wondering if that heater valve may have anything to do with it.
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