Mi Bao rice cooker is an old-fashioned mechanical rice cooker. The reason why it keeps warm is:

The magnet inside the magnetic cylinder in the middle of the heating plate loses its magnetism and cannot be attracted, which eventually leads to the contact being in a heat preservation state, and there is no attraction and heating, as shown in the following figure:

The large contact switch controlled by the magnetic column is damaged, which can not be turned on and off normally, resulting in heating failure. The heat preservation situation is shown in the following figure:

Solution to that above two situations:

Check whether the magnetic column can be absorbed. If it cannot be replaced in time to ensure that it reaches the predetermined temperature, jump off.

If the large contact switch is damaged, it can be replaced with a brand-new original switch to ensure good contact and conduction.

Note: Poor contact of wires or terminals connected to the large contact switch can also cause the unheated insulated lamp to light up. In this case, just reconnect and press.