At another development, in Florida, a fire started in a microwave that was not in use, according to the official fire report. Both of those incidents, reported to the Consumer Product Safety Commission, involved the same microwave, the KitchenAid KHMS155LSS.
A Consumer Reports investigation looked at thousands of pages of CPSC documents in its investigation of appliance fires, including many obtained through Freedom of Information Act requests.
More than 40 of the CPSC reports involved KitchenAid microwaves that turned on by themselves, some causing fires. Whirlpool, which owns KitchenAid, says it has not been able to verify a single report of a self-starting microwave.
Consumer Reports also examined 82 similar reports involving some GE microwaves, six of which involved serious fires. The reports listed various models, but 30 complaints involved the GE Spacemaker line of over-the-range microwaves. GE told Consumer Reports that it “has investigated unverified reports of ‘self-start’ and found them to constitute product quality, not product safety, concerns. Many have been determined not to be ‘self-starts’ at all.”
None of those microwaves has been recalled. And the problem is not limited to those two manufacturers. The Consumer Product Safety Commission told Consumer Reports it has “an open investigation into the safety of kitchen appliances, including microwaves.”
If you have a problem with your microwave, unplug it and have a technician look at it.
And it’s a good idea to know which circuit breaker turns off the microwave in case of an emergency. It you‘re experiencing a problem with a microwave or any appliance, Consumer Reports recommends notifying the manufacturer immediately. And report the problem to saferproducts.gov.