Electric pressure cooker display E4 fault code indicates that the pressure switch failure failure, that is, temperature control failure, may be due to poor contact with the pressure switch or temperature sensor damage, circuit board welding and other reasons.

The solution is as follows:

1, most cases of electric pressure cooker display E4 fault is caused by poor contact with the pressure switch, you can dismantle the pressure switch, with fine sandpaper on the pressure switch contacts back and forth, the upper and lower two contacts on the surface of the oxidized layer of cleanup, can be restored to normal.

2, the electric pressure cooker with a screwdriver, remove the bottom cover, with the method of pressure plus measurement to detect the pressure switch and connecting line connectivity, to see if the pressure switch is damaged, connecting line and terminals there is no false or broken circuit, overhaul.

3, check whether the resistance value of the temperature sensor of the electric pressure cooker is normal, if the temperature sensor is bad, you need to remove it for replacement.

4, check the electric pressure cooker power supply board, control pole in the soldering point, to see if there is no phenomenon of welding, will be welded to patch welding again.