Hi and Welcome to Just Answer,
Ok, let's take a look at this;
F-1 code means a failure in your device it could be a few things causing the problem. The magnetron could be going bad, the control board might be getting wore out,
It could be the switch to the door, not completely closing.
The manual states to contact a Service center, there is a one year warranty on this device
If you need more help Let me know
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If there is anything else let me know, If not click accept. Thank You Michael L.
I am sorry, let's try again
I am having trouble locating you model, Can you please verify the model number, and what country you are in?
Also, try unplugging it for 5 mins, there is a Auto demo thaty might have been started up