No heat may also mean a broken thermostat. On 10/17/06, Jim Cathey <[EMAIL PROTECTED]> wrote:
> Well everyone seems to agree that I should check the monovalve. > Something happened this morning that makes me wonder what the heck is > going on. This morning, I had heat. I had it set on the regular > non/ac vent mode. About half way to work, I noticed I was warm and > that > warm air was coming out the defrost. I did not have the defrost on. > After a little while, I was too warm, so I turned the temperature down > and it got colder and switched from defrost to vent. Changes to the venting have _nothing_ to do with the monovalve, only the control unit (embedded in the pushbutton array). How are the fuses feeding it? When deprived of power or vacuum, the system reverts to defrost-pattern heating. The monovalve is merely what controls if the system will heat or not, under command of the ACC brain. But you still _should_ check your monovalve. It's easy, and is a wear item that is often broken. (Torn rubber diaphragm.) -- Jim _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
