Hallo!
First of all, my apologies for my bad english, its such a rubbish!

My problem started ~week ago when the weather turned very wet +2,
before it was ~-5 to -22. Suddenly after ~20km driving my car on highway the AC/Heater panel went dark and air blowing stopped as well, had to open window. Replaced the fuse, everything worked fine for some time, but it still randomly keeps blowing the fuse.
So, few days ago i took out the heater motor, manually spinned it and it runs almost freely, but it stops littlebit too suddenly. I cleaned it with airflow (lots of black dust came out) put some oil as well as possible to bearings, but the spinning was same. So i installed the motor back and hoped tha maybe now its OK, but nothing... Next morning, after ~30km when i was dropping speed to turn off the road the fuse burned again...
Any ideas!?
Thank you very much!

and the car is 99 Cougar 2.0 Zetec