Does it turn for just a moment or does it keep turning?
If it's just for a moment, that's normal.
If it stays on, either your top or bottom door switch is sticking or it's door switch mount is loose or broken.
Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.
Door
switch or mount trouble can be caused by slamming the door or by
opening the door while it's cooking without hitting the Stop pad first.
There
are plastic mounts inside the microwave which hold the door switches
and onto which the door latches lock when you close the door.
The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.
Sometimes
it's a broken tab on the switch holder, allowing the switch to rotate
just out of position. Other times, it's a broken tab on the switch
holder, allowing the switch to rotate just out of position. This tab
can be hard to see, since it is under the bottom edge of the switch.
One test that sometimes helps is to gently lift up on the door or
handle as you try to start it. If it works or tries to work, then it's
a door switch mount or door alignment issue.
If
you or someone you know decide to look into it, we have critical
information on safety, disassembly and door switches at our site, and
our link is at our listing here on FixYa:.
What is your brand & model number? We may have the service manual you can download free.
We're happy to help you and we'd appreciate your
thoughtful rating of our answer.
Remember, while
you can do some repairs on your microwave, what you don't know can kill you...
even on an unplugged microwave, so make sure you understand the dangers and how
to reduce them before you try anything inside a microwave. If you want to
do more yourself, let me know and I will point you in the direction of some
good resources.
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