Thermal temperature **would** pass through, but would not deal damage directly. As with everything else in DnD 5e, if the spell specifies, it does. > It is immune to **all** damage emphasis mine. However, The temperatures involved do not deal damage directly, rather >Some special abilities and environmental hazards, such as starvation and the long-term effects of freezing or **scorching** temperatures, can lead to a special condition called exhaustion. emphasis mine again ([SRD Here][1]) Seems that RAW, thermal conditions WOULD pass through a wall of force. This would be consistent with light passing through the invisible wall. (the counter to (thermal = fire) is (light = radiant)). [1]: http://www.5esrd.com/gamemastering/conditions/#Exhaustion