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My panasonic microwave oven model #nnsw968w will not heat. It reverts to signal "H97". Is this a problem with it's "child lock" function?

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  • richard_ob1 Nov 02, 2010

    advice well given. I agree that this microwave is faulty.

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  • Ovens Master
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No, the H97 error code signals the fact that the inverter board - the board that supplies the power to the magnetron (the part that produces the microwaves) - has failed. This is a hardware fault, and a critical one: no inverter = no high tension = the magnetron can't work = no microwaves = no heat.
Since the inverter produces very high tension - over 5000 volts - when it fails it fails completely - the board can't be repaired and will have to be replaced.
Since the high tension can easily spark if you get near the capacitors on the inverter board (they remain constantly charged, whatever happens to the rest of the board) and the spark will kill you instantly , you should not even get near to it, leave this repair to well protected professional. It will cost you around $150 so you should think very carefully if it's worth repairing.
Personally i wouldn't trust an oven that has suffered such a severe failure.

Posted on Nov 02, 2010

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