Panasonic NNA755W microwave fault

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  • October 29, 2009 at 2:21 pm #49708
    stephen66
    Participant

    Hello,

    I have a Panasonic NNA755W microwave/grill/oven and the microwave does not work. Last night we used it as a conventional oven and it worked
    but there was a burning smell. When we tried to use it at lunchtime
    today as a microwave, it switched itself off after a couple of
    seconds. When we tried again it whirred for a bit longer but it did
    not heat the food, and a third time it switched itself off after a few
    seconds again. It is now unplugged.

    I have used the UKWG repairer search and am waiting for replies. Does anyone have a rough idea what i shoudl expect to pay for an inspection/repair? I’m wondering whether it would be cheaper to buy a new one? Probably it would for just a cheap microwave only but this is a combination oven so I wonder if it might be cheaper to repair?

    Thanks,
    Stephen.

    July 9, 2010 at 3:24 pm #300798
    nick dove
    Participant

    Re: Panasonic NNA755W microwave fault

    I have an apparently identical fault on a panasonic NN A772S combination oven (microwave/convection/grill). I got/get the burning smell, the sudden failure, and switching itself off after precisely 10 seconds. Before switching off, at about 5 seconds there is a small click, and then more clicks around 7 seconds as though it’s attempting to do something.
    Convection still works.
    I am also looking to find out if I should pursue a repair or just buy a new one (it’s about 8 years old).

    Stephen – what did you end up doing?

    Thanks

    Nick

    July 12, 2010 at 9:50 am #300799
    electrofix
    Moderator

    Re: Panasonic NNA755W microwave fault

    both of these microwaves will probably say invertor on the front

    the electronics inside the machine switches the unit off if the microwave hass not started so your problem is in the invertor section of the machine

    this is not a home repair due to 5000 volts at the magnetron. it is likely to cost over £100 to put right but you may find a dealer with secondhand spares

    Dave

    July 12, 2010 at 10:34 am #300800
    nick dove
    Participant

    Re: Panasonic NNA755W microwave fault

    electrofix wrote:both of these microwaves will probably say invertor on the front

    the electronics inside the machine switches the unit off if the microwave hass not started so your problem is in the invertor section of the machine

    this is not a home repair due to 5000 volts at the magnetron. it is likely to cost over £100 to put right but you may find a dealer with secondhand spares

    Dave

    Dear Dave,

    Thank you very much for this.
    Yes it does have ‘inverter’ written on the front.
    When you write “not a home repair” do you mean that it would need to be taken to a workshop, or that it’s not a diy job?


    Thanks again

    Nick

    July 12, 2010 at 1:17 pm #300801
    electrofix
    Moderator

    Re: Panasonic NNA755W microwave fault

    because of the high voltages involved it is not a job to be undertaken by untrained person. there can be enough voltage to knock you across the room after the unit is switched off

    the job can be undertaken in your own home or at a workshop. we are in merseyside but there will be other technicians around the country who may be able to quote

    look in repairs@ to see if anyone else covers you part of the country

    Dave

    July 12, 2010 at 7:50 pm #300802
    nick dove
    Participant

    Re: Panasonic NNA755W microwave fault

    Thanks very much Dave

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