The lid was opened at approximately 1.6 hours for a duration of 1 minute. Then the lid was closed, taped shut, and two layers or corrugated plastic were placed on top of the lid.
T3 does rise briefly, topping out at 8C, but recovers within one refrigeration cycle.
The fan was mounted to the cold well, and not the lid, to circulate air on top of the blood products. Because the fan did not change position when the lid was opened, and the lid seals were no longer containing the airflow, cold air was flowed straight out the front of the cold well and was lost. No doubt the layer of cold air will be disturbed during normal operation when units are loaded or removed from the cart, but it's not necessary to actively eject it. I'll move the fan mounting position to the lid so that when the lid is opened airflow will be directed up and away from the cold well.
The next test will involve opening the lid of a longer period of time.