Is there a set of commands that I can give my Phaser 8400 color printer that will allow me to drain one (or more) of the ink reservoirs. Also, is it possible to change the temperature setpoints of the ink melters and/or the reservoirs?
No, there isn't a way to drain the ink without destroying the printhead and all of the temps are set at the factory. That's an odd request - is there something wrong with your Phaser?
Nothing wrong with my Phaser...yet. As part of a science fair project (gone bad), foreign material (i.e. crayon) was introduced to the yellow ink stream. I need to purge this material in the hope of avoiding damage to the print head.
I would suggest to first remove all the yellow insticks in the inkloader, created a solid yellow page (in word, a pdf, whatever) and print duplex(if possible) until you run out of yellow ink. May take a while but is the only way to purge ink out of the printhead that I can think of.