Question about Microwave Ovens
An F9 error code on a General Electric oven indicates that the
oven's electronic control system has detected a problem with the
automatic door lock. The automatic door lock mechanism prevents the oven
door from being opened when the oven is set for "Clean" mode. The
malfunction may be a jammed door lock mechanism, a pinched or broken
wire, a faulty lock switch or a fault in the control board itself.
Things You'll Need:
Disconnect power to the oven.
Open the oven door. Remove three screws from underneath the oven's control panel. Lift the control panel straight up to disengage the mounting pins on the top corners of the panel, then tip the panel toward you.
Inspect the door lock mechanism. The mechanism is in the lower left area of the space behind the control panel. Rotate the cam on the door lock mechanism to be certain it moves without binding. Replace the mechanism if its mechanical parts do not function properly.
Inspect the wires that connect the door lock mechanism to the control panel. Check for pinched or broken wires. Check for wires with frayed insulation. Repair wires as needed if defects are present.
Locate the six-pin connector on the door lock motor on the right end of the door lock mechanism.
Rotate the cam on the door lock mechanism to the unlocked position. Test the resistance between Pin 3 and Pin 1 of the door lock connector with the ohmmeter. The resistance should be 0. Replace Lock Switch 2 of the door lock mechanism if the resistance reads other than 0.
Rotate the cam on the door lock mechanism to the locked position. Test the resistance between Pin 3 and Pin 2 of the door lock connector with the ohmmeter. The resistance should be 0. Replace Lock Switch 1 of the door lock mechanism if the resistance reads other than 0.
Contact a certified repair facility if the source of the F9 code has not been discovered.
Troubleshooting the oven with the electric power turned on is a job for a certified technician.
Do not perform troubleshooting on the oven with the power connected. Personal injury and damage to the oven can result.
Posted on Aug 04, 2010
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Posted on Jan 02, 2017
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