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My ponosnic microwave model mnc994s starts and runs about 2…

Customer Question
My ponosnic microwave model...

My ponosnic microwave model mnc994s starts and runs about 2 seconds and stops.

Contractor's Assistant: How long have you had your MNC994S?

Don't really exactly but maybe 7 yrs ago

Contractor's Assistant: What have you tried so far?

We unplugged to see if it would reboot. Tried to set time clock. Last night when the problem started there were : on the display screen.

Submitted: 7 months ago.Category: Appliance
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Answered in 1 hour by:
12/17/2017
Appliance Technician: Tyler Z., Appliance Doc replied 7 months ago
Tyler Z.
Tyler Z., Appliance Doc
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Satisfied Customers: 88,525
Experience: 9+ years being an appliance technician with factory training.
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Appliance Technician: Tyler Z., Appliance Doc replied 7 months ago

So this is probably the most common issue that Panasonic microwaves get. It can be caused from several things, but it all means the same thing–the magnetron is not drawing the amount of power needed. You could have a faulty magnetron itself, a faulty inverter board, or one of your door switches can just not be activating correctly. You can’t test the magnetron or the inverter board, so the best thing to do is check the door switches. Unplug the unit and remove the control panel. This will give you access to the door switches to the left of the control panel opening. There should be 3 switches which you can remove and make sure they don’t look burnt. Push on the little actuator buttons and see if the switches still click. If so then reinstall the switches and shut the door to make sure the door is activating all the switches when the door shuts. If so, then it’s time to guess which part you want to replace–either the magnetron or the inverter board. The manufacturer will tell you to replace the inverter board first, but it’s really a toss up.

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Appliance Technician: Tyler Z., Appliance Doc replied 7 months ago

Hello again. I'm just following up because I haven't heard back from you and I see this question is still open and unrated. Is there anything else I can help you with?

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