1, electric pressure cooker shows E4, meaning poor installation.

2, the fault causes of fault E4 are:

Pressure switch disconnected, adjust or replace the pressure switch.

Pressure switch socket or connecting wire poor contact, overhaul the socket and connecting wire.

Display board failure, replace the display board.

3, the electric pressure cooker encountered fault code E4 fault problem, if the socket switch poor contact and other operations can be caused by their own solution, if the electric pressure cooker caused by the internal causes need to be disassembled and repaired, please go to the after-sales service repair to find a professional maintenance personnel repair.