RT @michaelmontano: The system change mentioned here was part of a planned migration that wasn’t quite ready to go live which we unintentionally triggered before we were ready.
Error code C03! Mitsubishi Ecocute displayed. I pressed and held buttons "Hot water temperature ▼" and "Display (tank temperature)" for 3 seconds. I canceled "Midnight only mode" and set "Full tank mode". Ecocute boils water. I am wainting.