#1 I did what you said, pushed the buttons. The 5lb lite came on then the 3lb. blinked and both stayed on, the thaw fan came on and I unpluged it for 20 sec.. I pluged it back in and the express thaw was on for 4hrs.. I cycled through, it turned off. I closed the door and the light stayed off. It went down different but the results were the same.
#2 I clean them yearly but I got this late and will check tomorrow.