1. You need to use professional tools to remove the workbench.
2. After removing the workbench, you need to remove the instrument components, and be careful not to break the connecting wire.
3. After removing the instrument assembly, you can see the whole picture of the heater, in which three screws are connected. You need to remove the top screw first, and then remove the other two screws.
4. Remove the water pipe connected to the heater box and take it out.