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#1
08-10-2012, 08:34 PM
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Heat/Duo Valve problem
1997 E420----No codes coming up.
Ok, I have rebuilt the duo valve and put it all back together, however, I am still blowing luke warm air and no A/C from the center vents. When put on "HI" it seems to blow some warm air out of the side vents only. This is a CA car with about 160K on it. Granted I have to check the A/C refrigerant level but still trying to get the heater working. I did rebuild the thing per this link. How I fixed my duovalve (W210), got my heat back and saved myself $250! - PeachParts Mercedes ShopForum The coils look good with all pieces of electrical connection good. What else could be happening? Could it be that when I trimmed the broken rubber from the upper O-ring that I am now getting a mixture of radiator fluid from one side of the duo-valve to the other? Thus needing a NEW duo-valve? Doesn't seem possible but.....how can I get heat withing the normal temperature range without going to the "HI" setting?
__________________
Norm K. '97 E420 Sport '06 E350 Sedan '67 Mustang Coupe '70 F-250 '15 VW Jetta 
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