S320 HEAT in San Diego
Thread Starter
Member
Joined: Mar 2002
Posts: 165
Likes: 0
From: Imperial Beach CA
1995 S320 and 1995 S500
S320 HEAT in San Diego
I am going crazy! 
My heat is out again. I took it to the dealer who told me thate the climate control "duo valve" was bad. Well I bought one from the wrecking yard. I had heat for about a month. Heat is out again! I have replaced this Duo-valve three times. It makes me believe it is something else. Anyone have expierence with this?
HELP!!!!!!!!!!!!!!!
Gman
My heat is out again. I took it to the dealer who told me thate the climate control "duo valve" was bad. Well I bought one from the wrecking yard. I had heat for about a month. Heat is out again! I have replaced this Duo-valve three times. It makes me believe it is something else. Anyone have expierence with this?HELP!!!!!!!!!!!!!!!
Gman
Senior Member
Joined: Jul 2003
Posts: 455
Likes: 1
From: Fl
92 500sel/01 320e wag
I cant tell you more, but the default for the duo valve is open, that means unless it gets a voltage to close is is open. It could stick shut but why, if you want heat pull the connector, it is probably your dash controller
Member
Joined: Feb 2007
Posts: 245
Likes: 11
From: Los Angeles
1997 E420
This may help:
http://www.benzworld.org/forums/w140...duo-valve.html
I found it searching for "w140 duo valve" on my new Mercedes search site, powered by google. Give it a try for hopefully more help!
http://www.benzworld.org/forums/w140...duo-valve.html
I found it searching for "w140 duo valve" on my new Mercedes search site, powered by google. Give it a try for hopefully more help!
Junior Member
Joined: Nov 2006
Posts: 25
Likes: 1
From: San Diego, California
2004 W211 (E320)
I'm another thin-blooded San Diegan, just discovering the heater. Other readers won't feel too sorry for us when they find out we are shivering in 55º weather.
Actually I just got my 96 S320 last week. It's near perfect and a great delight (after putting over 300K miles on a 126 that was a great, but comparatively primitive, car).
But please, somebody tell us how to make the air conditioner turn off and the heater turn on. The temp may plummet into the 40's!
And, the instruction manual's explanation aside, what do the little red and blue buttons on the center vents do?
Actually I just got my 96 S320 last week. It's near perfect and a great delight (after putting over 300K miles on a 126 that was a great, but comparatively primitive, car).
But please, somebody tell us how to make the air conditioner turn off and the heater turn on. The temp may plummet into the 40's!
And, the instruction manual's explanation aside, what do the little red and blue buttons on the center vents do?
