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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. If it stops at 16
seconds and is a sensor model, it probably has a defective humidity
it stops after 7 seconds, it has a problem with the inverter. If it stops at 2-3 seconds, see if this describes
in time, push start and unit runs
for 2 seconds, relay clicks, unit goes off. Cook time on display goes
off and clock time comes back. Bad upper interlock switch and charred
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.
it stops after 7 seconds, it has a problem with the inverter.
It may be a loose connection in the wiring between the
inverter, magnetron, and/or control board, or maybe one of
components has failed.
Due to the lethal
voltages used and produced in inverters, I do not recommend that an
inexperienced person work on these.
3 things can fail - the control board, the inverter board, or the magnetron. If the microwave runs for about 7 seconds with a ticking sound..then stops and shows "F-9", it is the magnetron that has failed. The fact that the unit starts and runs with the TICKING SOUND means the control board is sending signal to inverter board and the inverter board is sending signal to magnetron. Magnetron is covered by full 5 year warranty, inverter board is only 3 years.
If this is not the case then it could be a defective control board, inverter or line voltage too high.
Please do rate the solution as "FixYa" if found useful and revert for further assistance.
Hi, F-9 error code indicates a defective control board, inverter or line voltage too high. f the microwave runs for about 7 seconds with a ticking sound..then
stops and shows "F-9", it is the magnetron that has failed. The fact
that the unit starts and runs with the TICKING SOUND means the control
board is sending signal to inverter board and the inverter board is
sending signal to magnetron. Magnetron is covered by full 5 year
warranty, inverter board is only 3 years.
Although your model number doesn't seem to show up, the NNS950-series units are powered by an high-voltage inverter. And yours has failed.
While an inverter (switched-mode power supply) is more efficient from a power consumption standpoint, it is more complex, thus more statistically prone to fail. These should only be examined and worked on by someone who has the necessary technical qualifications. Seriously.
Often the machine-soldered connections in a microwave inverter are too weak, so they eventually fail, especially if heat is high in the area. They sometimes fail catastrophically.
When not catastrophically damaged, you may hear clicking or squealing and may smell an electrical odor, which is sometimes obscured by the cooling fan.
Sometimes a whole new inverter is cheaper than the time and labor required to fix the old one.
If a technician is willing and able to troubleshoot and repair the inverter to component level, it will may be expensive, but may be worth it, especially if he or she will resolder and reinforce connections as needed as part of a thorough repair. That could easily make your inverter beter than a new one!
You might be able to get some verbal estimates if you call Panasonic-authorized appliance / microwave repair shops and ask then specifically about inverter component-level repair and simple inverter replacement costs for your exact model number.