ActronAir WRECMF1 Multi Function PCB Kit is a replacement PCB kit for compatible ActronAir WRE series wall split indoor units, providing the combined control functions required for indoor unit operation including fan control, mode selection, and fault diagnostics. A failed multi-function PCB causes complete loss of wall split indoor unit control — fit the 100% Genuine ActronAir WRECMF1 to restore factory performance. Isolate power at mains before replacement -- live work on electrical components is dangerous and must only be performed by a qualified technician.