Merle J San Clemente , CA November 04, 2016 Appliance: Maytag 27" Built-In Double Electric Oven Convection JJW9827DDS30 Maytag Oven Jjw9827dds30: The fan for the convection would just hum and not spin sometimes. How to replace Fan-Convct. Replaced the convection fan/heating element assembly with a new one from AppliancePartsPros. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes