This is usually caused by either a bad door switch, a loose door switch mount, or occasionally a problem on the control panel.
If the door switch is not properly activated when the door is closed, the controller thinks the door is not shut and it will not start.
Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.
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.
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.
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 (and/or push down) 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:
You can find helpful exploded view diagrams and order parts by entering your full model number here
may also be a "mini-manual" hidden inside the unit behind the control
panel or hidden on the left side behind the grille, which is very helpful
when troubleshooting & testing.
If you only need a switch, you can order one from us
for $5 postpaid.
If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.