Replacing the air conditioner main board ensures that all functions of the air conditioner operate normally, preventing issues such as mode confusion or inability to start, and making it more worry-free to use. Replacing the air conditioner control board allows for more precise temperature control, quickly and stably reaching the set temperature, avoiding sudden cold or heat, and improving comfort. Replacing the air conditioner computer board makes the operation commands respond more quickly, with immediate effect when adjusting modes or fan speed, without long waiting times. Replacing the air conditioner drive main board reduces abnormal faults during operation, prevents frequent shutdowns, and ensures continuous and stable operation of the air conditioner. Compatible for Fujitsu，K12JX-C-A(02-01) Circuit PCB 9709423028, Manufacturer: SANdi chen