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Variable speed motor fan - Help Needed!

Dear all, here is the situation I've struggling with:
I have a DC variable speed motor fan that sometimes works and sometimes
doesn't .
It has 3 terminals, one common, one for 12 V and the other 9V. The 9 V
terminal I believe is the one used to control the fan speed. I really
don't have a clue why this motor is so unstable. Any hint???
tks in advance
 
D

default

Jan 1, 1970
0
Dear all, here is the situation I've struggling with:
I have a DC variable speed motor fan that sometimes works and sometimes
doesn't .
It has 3 terminals, one common, one for 12 V and the other 9V. The 9 V
terminal I believe is the one used to control the fan speed. I really
don't have a clue why this motor is so unstable. Any hint???
tks in advance

Give us a lot more information.

tks in advance
 
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