The primary (I haven't checked the secondary yet) glycol loop in the CSM behaves strange since about a month: evap out temp stays constantly at about 35°F, no matter what you do. You can even go to extremes and bypass the radiators while the evap is deactivated: it stays stubbornly at 35°. Even more interestingly, the other temps don't go over the top in this config, instead it settles down to about 75°F radiator inlet temp and seems to be happy with that -which is, from my rudimentary understanding of thermodynamics, impossible.