An observation. I live in Los Angeles. During the day it is usually 70 degrees or more. But it can get cold at night. Yesterday, started out about noon. The temperature was about 65. It did as cold as 52 during the night. In Econ mode, the Clarity did go into System Check mode. The ICE fired up 3 times. Today, warm in the 80s. Did not drive until after 2 pm. The ICE did NOT fire up. Could it be that assuming the batteries are liquid cooled that the computer thought they needed to be warmed?