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