My wife's been complaining of wacky AC vent behavior, often going to defrost, and/or losing center vent output. Since I was fooling with the radio I pulled the PB array and had a look at its solder joints. I touched up the switches themselves but didn't see anything there. (I didn't really expect to, but I was in the area.) I then ran my checklist and found that three of the seven switchover valves had high impedance. I poked around at its body, and found that one of them 'came back', and then went away again. Huh. The U-Pull had a 300 SEL listed so I went there and found it nicely exposed already, so it was easy to pull out. I'd brought my meter and found that it also had several open valve coils, largely the same ones IIRC. I bought it anyway, it was cheap enough. (I got its cable plug too.)
Now, a new one is fairly expensive so since there is some room in there I figured I could just use both of them together to get seven good valves. (We'll see how that works out today. Takes a Y connector for the vacuum source and some splicing into the cable.) The question: Is this a common failure? I've not noticed that individual valves in the older cars have had much of a problem, but this integrated valve block perhaps is not so reliable? (Made by Eaton.) These two cars were both 1990's, for what it's worth. -- Jim _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
