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Question:

What does the pressure cooker show "E4" mean?

What does the pressure cooker show "E4" mean?

Answer:

The pressure cooker is not plugged in properly. We can polish the dots inside the pressure cooker with sandpaper and it will recover.
. Another is that the pressure switch itself fails, or the wrong signal that the control is wet.
This fault can be found from the inspection of the solder joint in the power panel and the control pole.
The most common fault is caused by power cable joint sealing off the plate

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