Hi,
When you say the motor is running do you mean the compresser?
And also, which fan is running, the one in the freezer or the one at the bottom of the fridge? It the compresser is turning on and then shutting off it could be overheating. Check to make sure the condenser in the bottom of the fridge is clear of any dust or hair etc. Also if the condenser fan is not working that also could make the compresser overwork.
JP, May 2005