E0: There is no pot or the pot is not suitable.
E 1 is a circuit board fault.
E2: The sensor is open or short.
E3: High voltage protection
E4: under-voltage protection
E5: Air combustion or furnace surface temperature is too high.
E6: Internal temperature is too high.
Regarding this suggestion, go to official website, a hard city, and have a look. Can solve problems quickly and have a good service attitude, which many places can't do.