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What else in on the circuit? Your oven should be on its own. If you live where I live, this should be a 20 amp 120 Volt AC branch wired directly from your power panel.
If this is not the case, have a licensed electrician install a proper circuit for you.
Try heating up touchpad with blowdryer , if that doesnt work replace touchpad.... On the smh9207st remove plastic cover from the back of the door . Remove 4 screws and 1 screw at the top of the door . Unplug two connectors Gently. ... Peel off front touchpad . Install is reverse of removal . Be safe .....part was $45 @ repairclinic.com
The F3 error code for a GE microwave means the control is sensing a stuck or shorted key. Try pushing every button multiple times and do it firmly.
Hold a blowdryer in the corner of the keypad then slowly move it down as you peel it back (but not off). Take a sponge with the tiniest bit of dish soap and run it over both the sticky part (back of the circuits) and the place it is stuck to. Blowdry this til touchably dry and then reapply the kaypad face. Wait about 10 minutes until you plug in again for it to cool off.
If that doens't work, UNPLUG the unit and try to gain access to the electronic control board. If you can there may be a ribbon cable you can unplug from the board and try wiping the end of the cable hard between your thumb and index finger then wipe with a paper towel and reinsert the ribbon cable. May work but more than likely you will need to replace the touchpad.
I believe you have a bad circuit breaker or fuse. If you have a delay fuse contrilling this circuit, that would explain the spotty availability of power to the outlet. Also, a faulty circuit breaker can operate in an irregular way, as you describe.
A microwave oven requires a lot of power, relatively speaking. If your microwave is a 1200 watt model, for example it draws 12 amps of power, which could well be almost all of the power available at that outlet, providing that other appliances were not also drawing power from that circuit at the same time.
I can assist you further, but if this information is all you need to proceed that is fine too. Get back if you need more assistance.
If the fuse
isn't the problem, check the door hooks and the door-release button.
When these are broken, the door switch doesn't activate, so the oven
can't work.
Check the wall AC outlet by using a meter or another electrical appliance such as a table lamp. If no power there replace the fuse or reset the circuit breaker.
Does your microwave light up when you open the door?
If not, it could be a bad power cord, on/off switch AC cord or fuse.
Check these first.
If you cannot solve the problem, you'll probably need service.
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