Originally Posted by bigeagle
Are you possitive it is the motor and not the fuse??? I had the same type of problem . Turn out to be the fuse a bad speed control if you will that looks like it has three springs or coils if you will. Right now i just can't think of name of the part. Anyway this part was the cause of bloeing the fuse. Power was not even getting to the motor as the fuse kept blowing. Food for thought.
I think you are right. I am having the same problem also. I believe it is a resettable fuse. Too many amps are pulled for what ever reason when the fan is on high and blows the fuse. But since it comes back on, it must be a resettable fuse. The cause is something else as other have mentioned, such as a bad fan motor, or a bad fan switch control. The 3 springs or coils you mention is probably the resistor.
In my case I have already replaced the fan motor, the fan switch and the resistor but I still have the problem. I believe that I have a resettable fuse that may have been weakened due to the bad fan motor and fan switch.
Problem is, I can not locate the fuse. I am still looking. It doesn't appear that I have a relay for the high speed.
When my fan stops all power is off on the controller. I discovered that by having it happen at night with the dash lights on. When the stops the light on the control goes out also. Again indicating that a fuse is be blown and then reset.