Hi Mike,
I'm new to the forum, found it while duckducking zymatic troubleshooting.
So I have an old zymatic from 2007 that I am trying to get back in shape. It needs glycol refill among other things, I understand from reading posts here. Also I get stepper failure error. The arm is moving and fluid circulating, however it doesn't hit the intended hole and thereby spilling a lot during attempting a cleaning session. I have red about entering a maint menu for adjusting the stepper, but I haven't found a description for how to open this hidden menu. I have removed the back lid and had a look, but before I go further on my own, just checking if there is a maintenance dismantle recommendation+description for dismantling steps. Also I wonder if there are any documents with lists of parts and dimensions for parts like hoses and so on. Thank you for your valuable contributions on the forum. I am also interested by the way, to sign up for ordering the controller card mod and steel step filter you mentioned earlier on when it becomes available.