I can purchase an acc dual valve shipped for $125.00 for my '95 280. Are there any vendors out there cheaper than this? I'm assuming this is my problem if I have cold air coming out of the middle vents and warm air coming out the side ones?

 

That's a pretty good deal. The place where I usually get parts from online is importec.com. They are usually pretty cheap, and the duo-valve is $185 there!

The duo-valve could be causing that. There's a way to check it ("sorta"). Sometimes if you give the duovalve a nice little smack with a screwdriver (or something a little heavier), you can break the valve free if it's sticking. Try that and see if the warm air starts coming out.

 

Thanks for the reply- I'll try that. The web site I found the duo valve on is www.autohausaz.com The part sells for $125.00 with free shipping. I thought it was a good price...may buy one just to have.