General time to cook porridge is longer than the time to do rice, the computer program set the time to cook porridge in 20 minutes if you are sure that the steam valve is placed in a sealed state, then it must be the pressure cooker itself out of the problem:

1. The needle of the pressure limiting valve and the exhaust pipe aperture has a different.

2. The rubber roll of the float valve is broken.

3. The temperature control and pressure switch of the pressure cooker are faulty.

It is recommended to send it to a professional repair center.