Runs when door is closed, only way to stop it is to unplug the unit.
Close the door and the unit starts running. All front panel buttons work (including the clear button) but will not stop the unit from running. Let it run a few seconds or so and touch the glass plate inside and plate is warm/hot, so heating is taking place. Could this be caused by faulty door switch? plus how to remove cover due to two lower torque screws that seem to require a special tool with a hollow center in the tip.
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Interlock switchIf your
microwave is turning itself on, the first thing to check is the
interlock switch. This is usually the first thing to malfunction that
could cause this issue. If the interlock switch is bad then it will need
to be replaced.
Main control boardIf
your microwave is turning itself on and the interlock switch is still
working, the probable cause is the main control board. If the control
board is defective it will need to be replaced.
The door switch is loose or fualty you can adjust the switches first to see if it hase just moved if this does not work then replace it.unplug the unit and remove the cover panel look between the controll panel and the cavity on the back of the front panell you will see two or three switches the (GREY or BLACK ) look for the retaining screw loosen slightly and adjust if this does not work the take notes of the wire positions etc on the switch get a new on eand replace close unit plug and play
Do you mean that when you close the door, the fan comes on? If so, it sounds like a bad door switch. Probably the secondary interlock switch.
This failure is caused by opening the door when the unit is in cook mode. On ALL microwaves, not just one or two brands.......
Be sure to push the stop button before opening the door to add or stir... Or wait for the cook cycle to end. (This is why microwaves have a two step function on the stop/clear button. Hit stop once to stop cook mode and twice to reset timer).
You should use an ohm meter to check all 3 switches. The switch can be either stuck 'closed' or physically closed but not 'making' electrically.