I am not sure if this helps but:
In the General Settings command under the Navigator Wall Conditions command the Default Wall radiative surface option was set to “non-Radiating surface”. The Flow developers do not recommend setting this option as the default option for all walls due to some issues with the Radiation option. I changed this option to Blackbody and reran the analysis for about 20 iterations (using a coarse mesh to speed up the solver time). The component temperatures were all above 50 C.