Why Konica minolta C450 showing error code C3752. How to resolve this problem

Dear
The temp. of fusing p. roller is abnormal high. pl. check the followings.
1-Check the Fusing Unit for correct installation
(whether it is secured in position).
2-Check the Fusing Unit, PWB-MC and PU1 for
proper connection and correct or change as necessary.
3-Change Fusing Unit,Change PWB-MC,Change PU1.

Thanks.