Repair Maquet Servo-s /Servo-i Air/Luft Module P/N:6463504,6650415,6671135 Main fault:flow sensor error, pressure sensor error, technical error code 25 Repair cost:$850-$1,250 (Due to different faults) Time: 2-4 days Warranty after fixed:60 days Note: We’ll calibrate the datas of each module after fixed, need to receive the whole module. Meanwhile,new original ones from Maquet are also available.