Question about Thermador MBYB Microwave Oven

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Microwave turns itself off after a couple of seconds

Our microwave, model MBY, turns itself off after a couple of seconds---doesn't matter what power setting it's on. The microwave is 5 years old.

Any ideas?

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Re: microwave turns itself off after a couple of seconds

Try to press in on the door after you strat it or down on the door after you start it your interlock switches my be going out

Posted on Jan 24, 2008

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Glass inside does not rotate now

The problem is typically the turntable motor, it is accessible by first disconnecting the power then removing the lower panel that houses the filters and lights. You will see a small device with 2 wires that looks similar to this
b162a2f.jpg The next most common thing to fail would be the coupling that attaches to this motor and sits inside the oven, you can take the glass tray out and lift the coupling, check for cracks or breaks, try running the microwave for a few seconds without the table and see if the coupling turns with the weight of the table on it. This may indicate a stripped coupling.

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Microwave turns itself off after a couple of seconds

Q - My microwave seems to shut off every once in a while, what might be wrong?
A - Make sure you hear the fan is still operating in your microwave. Next is to make sure the air intake grill on your microwave is not plugged up with air borne dust and dirt.
Q - The fan in my microwave oven is not running will this hurt my microwave?
A - YES, the fan cools the magnetron and electronics, take the microwave in for service, most fans are not too expensive to replace.
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The problem is the push-on connector on the UPPER door-latch switch; if the white plastic around this connector is brown (burning), the connection is going bad.

Cut the three white wires back about 1 inch and strip; obtain a new push-on and solder the three white wires into it-- a crimp is NOT sufficient for three wires into this little connector (defective design). Also clean the two blade on the switch before reconnecting as the heat has likely left a burnt coating.

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