20 Most Recent Panasonic NN-S541 Microwave Oven - Page 8 Questions & Answers

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Inverter and melectron faulty will couse this problem

Normally 40W, but check the bulb label near the bulb socket.

And of course, be sure to unplug the oven before removing or inserting bulbs, or the control board may be damaged. (I regularly repair these boards because of this.)


Ed Miller
[email protected]
MicrowaveControl.com

there is a motor under the underside of the microwave these motors can clog up. try turning the motor to by hand a few times so it makes a werring sound. if no sound its the slow gear in the motor broken and will need a new motor fitting.

https://www.manualslib.com/products/Panasonic-Nn-St652w-3493267.html Panasonic NN ST652W Manuals

Type S333 indicates something about the internal build; it's not the model number. Most Panasonic microwaves have a model number that starts with NN-S followed by 3 numbers and several letters. One microwave with the Type S333 on the serial number plate is the NN-S740BA. The manual for that is on the product support page: http://shop.panasonic.com/support-only/NN-S740BA.html . The direct link to the manual is ftp://ftp.panasonic.com/microwaveoven/om/nn-s740_mul_om.pdf . Please check for the actual model number. Add a comment with that model number if you would like me to search for the manual. I hope this helps. Cindy Wells

check your switch at door assembly

The Magnetron or its related control circuits have failed, does it heat?

door closed switch. look online for repair parts.

Defective control panel.

https://www.repairclinic.com/PartDetail/Light-Bulb/6912W1Z004B/1266875

hot moist air in an over will cause rust try for a warranty replacement as the period is too short for an expectation of life in the consumer laws next time buy a stainless steel oven section in a unit

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Free manual online at the link shown: https://www.winningappliances.com.au/public/manuals/Panasonic-Inverter-Microwave-Oven-NN-SF564WQPQ-User-Manual.pdf

H98 IS GOING TO BE THE MAGNETRON OR INVERTER OR BOTH, MAY BE BETTER TO REPLACE UNIT. INVERTERS NOT CHEAP. Get full warranty on new unit. If you have this one repaired typically only 90 days warranty and only on the parts you replace.

If you have had any power surges or lightning in your area it may have opened the primary winding of the transformer on the main board. You can check it by checking he resistance of the primary winding, it should not show open, You may see a burnt winding and that will tell you too that it had a power surge. That small transformer supplies power for the rest of the board to run but it must be the right voltage coming out.