The refrigerator side of my Sub-zero 561 is getting warm, even though the control is set to 10. I suspect the cold control, part 4201260. Before I buy another unit (which are expensive and hard to find), I wanted to check the installation of the current one. I read in some other posts that there is an installation diagram, but I can't locate it. Does the capillary bulb go directly behind the evaporator? Looks like mine is hanging below it.