Microwave fan won’t turn off Appliance Repair Questions › Category: Appliance Questions › Microwave fan won’t turn off -1 Vote Up Vote Down Denys asked 5 years ago Microwave stopped working. Fuse and thermal fuse (that runs exhaust fan) were bad and replaced. Microwave began working again but now the exhaust fan won't turn off. Not sure why or what to check next. Please login or Register to submit your answer Username or Email Address Password Remember Me