How to deal with error codes on the Xiaomi Multifunctional Cooker 1.5L?

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.lf-progress:focus::-ms-fill-lower { background: rgba(204, 204, 204, 1) }
.lf-progress:focus::-ms-fill-upper { background: rgba(204, 204, 204, 1) }
.lf-player-container :focus { outline: 0 }
.lf-popover { position: relative }
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.lf-arrow { position: absolute; z-index: -1; content: ""; bottom: -9px; border-style: solid; border-width: 10px 10px 0 }
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.lf-text-input { border: 1px solid rgba(204, 204, 204, 1); border-radius: 5px; padding: 3px; width: 60px; margin: 0 }
.lf-color-picker { display: flex; flex-direction: row; justify-content: space-between; height: 90px }
.lf-color-selectors { display: flex; flex-direction: column; justify-content: space-between }
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.lf-color-component input[type="range"] { margin: 0 0 0 10px }
.lf-color-component input[type="number"] { width: 50px; margin: 0 0 0 10px }
.lf-color-preview { font-size: 12px; display: flex; flex-direction: column; align-items: center; justify-content: space-between; padding-left: 5px }
.lf-preview { height: 60px; width: 60px }
.lf-popover-snapshot { width: 150px }
.lf-popover-snapshot h5 { margin: 5px 0 10px; font-size: 0.75rem }
.lf-popover-snapshot a { display: block; text-decoration: none }
.lf-popover-snapshot a:before { content: "⥼"; margin-right: 5px }
.lf-popover-snapshot .lf-note { display: block; margin-top: 10px; color: rgba(153, 153, 153, 1) }
div { margin-right: 5px; margin-left: 5px }
div:first-child { margin-left: 0 }
div:last-child { margin-right: 0 }Under normal conditions, the Xiaomi Multifunctional Cooker 1.5L operates normally after being powered on.
The Xiaomi Multifunctional Cooker 1.5L troubleshooting, error codes, and notes are as follows:

IssuesPossible CausesSolutionsThe display doesn't light up.The socket has poor contact.Replace the socket.The power plug is not properly plugged into the socket.Tighten the plug securely.The power plug is melted, deformed, or damaged.Contact the after-sales service team.A display error occurs.Contact the after-sales service team.Power does not turn off after the water boils or the cooker heats, but the water does not boil. 
A temperature sensor error occurs.Contact the after-sales service team.A circuit board error
occurs.Contact the after-sales service team.The power supply is not connected normally.Connect the cooker to the power supply.The cooker does not heat up.The heating function is not enabled.Start heating according to the user manual.A circuit board error occurs.Contact the after-sales service team.A heating pipe error occurs.Contact the after-sales service team.A thermostat error occurs.Contact the after-sales service team.The display shows "---" when the cooker is lifted up.The cooker is not placed on its base.Place the cooker back on its base.The display shows E02.The sensor has a short circuit.Contact the after-sales service team.The display shows E03 for a boil-dry error.The temperature sensor detects that the temperature has exceeded the upper limit.The cooker will return to normal status after the temperature decreases or water is added. If the error persists, please contact the after-sales service team.A circuit tripping or garbled display error occurs.Water is getting inside the coupler.The product can be used normally after air drying. If the problem still persists, please contact the after-sales service team.

Issues	Possible Causes	Solutions
The display doesn't light up.	The socket has poor contact.	Replace the socket.
	The power plug is not properly plugged into the socket.	Tighten the plug securely.
	The power plug is melted, deformed, or damaged.	Contact the after-sales service team.
	A display error occurs.	Contact the after-sales service team.
Power does not turn off after the water boils or the cooker heats, but the water does not boil.	A temperature sensor error occurs.	Contact the after-sales service team.
	A circuit board error occurs.	Contact the after-sales service team.
	The power supply is not connected normally.	Connect the cooker to the power supply.
The cooker does not heat up.	The heating function is not enabled.	Start heating according to the user manual.
	A circuit board error occurs.	Contact the after-sales service team.
	A heating pipe error occurs.	Contact the after-sales service team.
	A thermostat error occurs.	Contact the after-sales service team.
The display shows "---" when the cooker is lifted up.	The cooker is not placed on its base.	Place the cooker back on its base.
The display shows E02.	The sensor has a short circuit.	Contact the after-sales service team.
The display shows E03 for a boil-dry error.	The temperature sensor detects that the temperature has exceeded the upper limit.	The cooker will return to normal status after the temperature decreases or water is added. If the error persists, please contact the after-sales service team.
A circuit tripping or garbled display error occurs.	Water is getting inside the coupler.	The product can be used normally after air drying. If the problem still persists, please contact the after-sales service team.