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Yes, a bad door interlock switch would cause this; either the top switch or the bottom switch. (The middle switch is called the Monitor switch. If it were bad, you microwave would blow fuses as soon as you press Start.)
Remove outer cabinet. Identify the bad switch in the latch assembly. The microswitches are held in by a plastic tab. Remove the electrical connections and note their location.Carefully push tab aside and the switch will pivot on one of the mounting holes. Be careful. The plastic tab can easily be broken if you use excessive force.
Remove the grill on top and there will be a screw for the control panel. Once the control panel is tipped down you can see the door switches . Adjustment is a combination of the switch bracket and door hinge adjustment, You should have access to a Rf leak detector to inspect the door anytime the hinges or latches are serviced. Eric
You got it! One of the door switches is not activating. Take a look at the door itself first. There should be two tabs that stick out. These tabs will engage in the holes near the control panel. If the door does not have a broken tab then the problem is behind the control panel on one of the switches. There are 3 switches back there.
Unplug the power cord, it is usually in the cabinet above the microwave oven. Then take the grille off the top, the screws for the grille are on the top of the unit facing down. With the grill off you will see the one screw on top of the control panel, remove that screw and lift up and out on the control panel this will give you access to view the switches and test them with an ohmmeter.
Check the door safety interlock system. Remove the cover - test the little switches near the door lock.
These switches fail because we all open the oven door while the oven is operating. Thbis causing arcing and failure. When they fail, the oven doesn't know the door is closed and will not turn on the heat.
one of the 2 door switches is bad.they can be accessed by removing the control panel.switch is mounted on door latch assly.switch is about $ 10.00 and easy to replace.
if unit runs with door open then one of the door switch is stuck closed.there are 2 door switches and they could be assesed by removing the control panel.disconnect wires from top and bottom switches and chkf for continuity.they should be normaly open when the door is open and closed when door is closed.one of them will closed even when door is open.replace that bad one.
A lot of those you can replace the bulb without taking it down. There should be screws at the top that lossen up the vent in the front. Remove the vent, might have to open the door and slide it to the left (a little latch) then you should see a filter that just comes out and behind that is the bulb. I would try that before taking it down Forgot to mention that in the other e-mail.
The two possible causes are a faulty door switch and a bad magnatron. You can pull the top cover off of the unit and check all of the door switches (there are 2-6 of them all on a common rail, me normally closed)). If the door switches all check out, replace the magnatron, diodes, and capacitor
, and capacitor
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