master control board and installation box
components;
5) Pry open the buckle of the PCB installation
box with a straight screwdriver to see the
PCB board;
6) Remove 2 screws using a cross screwdriver
to remove the master control board;
7) Pull out the connector terminal and replace
the master control board in reverse steps;
*The temperature control indication sticker is
likely to be damaged when replacing PCB, thus it
is advised to prepare one for standby before
replacement: