CR-Z IMA FAN P1448 Options and ideas. 

So code p1448 means the fan is bad ?

Hello, great video, can you advise on an equivalent power transistor i can use, the 2sk3755 n mosphets are hard to find, other than in china?

Any chance you'd know the pinout for those? I assume red would be 12v+ and black should be ground. Are the blue and yellow ones the tachometer and pwm signal, like in any regular 4pin computer fan? If so, any idea which is which? (PS: sorry for kind of asking the same thing again, I couldn't really tell just from reading its circuit diagram)