Hi All. Probably a long shot but after some information on this machine. Original fault was not working after power surge. Replaced main pcb, machine started to work but display still off, replaced display pcb. Display now on but has error code E4 & E12 Defrost errors in both freezer sections. Both iced up. Heaters meter ok but cutouts give erratic readings. Freezer side open circuit when frozen or room temp in both. Dual compartment white side 11.5M frozen & 9.6M room temp. Red side 500.25m frozen and open circuit at room temp.Tried new cutouts with reading of 0.3ohm to 0.5ohm at room temp but still showing faults.At a loss now so require wiring diagram, technical information or both. Any information or advice would be greatly appreciate. Thanks in advance Ian