Kenneth B Miramar Beach , FL April 25, 2015 Appliance: General Electric Free Standing Microwave JVM1870BF001 Ge Microwave Jvm1870bf001: Hob fan in microwave appliance was noisy. How to replace Motor Ventilation. I ordered a new fan and motor unit and replaced the faulty unit.The case of the microwave was easy to unscrew and remove. The most difficult operation was to remove the appliance from the wall bracket as it weighed about 28kg. The cable connection to the motor was a push fit. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes