Citroen Xsara blown fuse

40 amp fuses are normally important fuses protecting engine cooling systems and such like. Replace it they are only about 50p each.

This is for late 2002 models , For use with vehicles RP No 9442 (nov 2002) - 9899 (dec 2003) Junction box - fuse box (PSF1) in engine compartment F1 10A - Heater unit - vehicle speed sensor - automatic gearbox electrohydraulic block - automatic gearbox control assembly - reverse lamp switch - engine coolant level switch - high speed fan supply relay - air flowmeter - gear lever blocking actuator control relay - starter inhibitor relay F2 15A - Fuel gauge pump F3 10A - Anti-lock brake control unit - ESP ECU F4 10A - Injection ECU - automatic transmission control unit F5 10A - Automatic transmission control unit F6 15A - Front fog lamps F8 20A - Injection ECU - diesel fuel high pressure regulator - low speed fan supply relay F9 15A - Left-hand headlamp - headlamp height adjustment control F10 15A - Right-hand headlamp F11 10A - Left-hand headlamp F12 10A - Right-hand headlamp F13 15A - Horn F14 10A - Front/rear screen wash pump F15 30A - Ignition coil - downstream oxygen sensor - upstream oxygen sensor - cylinder injector 1 - cylinder injector 2 - cylinder injector 3 - cylinder injector 4 - purge canister solenoid valve - diesel injection pump - EGR + butterfly electrovalve - carburettor or throttle housing heater resistor - all or nothing solenoid valve (EGR) - diesel fuel heater F16 30A - Pulsair pump F17 30A - Windscreen wiper motor F18 40A - Heater blower motor - blower control module - passenger compartment air thermistor - engine compartment fusebox panel MF1 20 - 80A - Low speed fan supply relay - high speed fan supply relay MF2 20 - 80A - Anti-lock brake control unit - ESP ECU MF3 20 - 80A - Anti-lock brake control unit MF4 20 - 80A - Built-in systems interface MF5 20 - 80A - Built-in systems interface MF6 20 - 80A - Free MF7 20 - 80A - Ignition switch MF8 20 - 80A - Coolant circuit heater

I have tried replacing it but just blows again.