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Question and Answers


what does F9 mean on micro wave model 721 636 643 00


Thank you for your question. The F9 error code indicates an inverter failure. This can sometimes by caused by a power surge or glitch through the electrical lines. You can sometimes clear this fault by completely unplugging the microwave for 1 minute. Plug it back in and see if the fault code returns. If it does, then you have an internal component failure that will need to be serviced by a technician. Due to the inherent dangers involved in repairing microwaves it is strongly recommend that a service technician service the microwave. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.

We will give repair instructions on any other appliance that a customer can safely complete.

You can have the microwave repaired at your home by a Sears technician. Here is a link for the website: Sears Home Services .

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
December 29, 2010