Panasonic microwave oven cuts on for two seconds then shuts off

check Capacitor, HV diode & Magnetron..

We recommend you use the below link to locate an authorized service center. Panasonic microwaves have a 5 year warranty on the microwave.

www.panasonic.com/repair

Possible that the protector works, there is a thermal switch which is located to prevent fire and if there is a malfunctioning of the waveguide, magnetron or the circuit it can cut off the circuit.
click this link for part location. : microwave

Your microwave generation system has failed and Panasonic recommends that you get it serviced by a qualified tech. Hope it is under warranty!

We would need to know the brand and full model number to be sure, but since you posted in the Panasonic section, I'll assume it's a Panasonic.

Panasonics have preset times in which it will shut off if certain failures occur.

If it stops at 16 seconds and is a sensor model, it probably has a defective humidity sensor.

If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter, controller, magnetron, or a bad connection from one or the other.

Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

my over the range panasonic microwave turns off after 5 seconds????

my microwave shuts off after a few seconds. is there a fuse that needs replacing?

What type of microwave is it (make and model)?

My panasonic microwave model # NN-S540BFW stops after 4 seconds after you hit the start button and cuts off on its own. What is wrong with my microwave?

Even though these are different symptoms, the same part may be causing both.

If the digital programmer circuit / controller does not get a feedback signal from the inverter for a period of 3 seconds, the controller will stop the cook cycle.

If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.