Model Number: GFSF6KEXCWW
Brand: GE
Age: 1-5 years

When evaporator fan turns on it sounds like a vacuum pump. This happened one day and continued for about a week then quit. I noticed the refrigerator warming up a bit and also noticed the evaporator fan quit working. I pulled the panel off and checked the fan and it seemed fine but replaced anyway. No ice buildup. Condenser runs and keeps the freezer cold but fan doesn't run to circulate cold air to refrigerator compartment. There is 12 volts from the power control board and 5 volts to evaporator fan. Could this be the main board? Thank you for any ideas.