Question about Neff Microwave Ovens

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Microwave turns itself oo

I have a Neff H5470SOGB built in microwave about 3 years old. It starts OK but turns itself off after approx 20 secs.

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It sound like the inverter unit is faulty or the magnetron is gone.the only real way to find out which is to change each one in turn,sorry i cant be any more help.if you have any more questions get back in touch,regards les

Posted on Jul 28, 2009

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Neff b6774N0gb/02. Inner glass shattered. replaced. Internal fuse blown. replaced. Now microwave working (heating water) for approx 5 sec, then switching off, beeping and showing E1 fault. Also display...


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Stopping after 2 secs usually means the inverter or magnetron have failed, or worse case scenario both. A microwave can be storing up to 4000 volts even when switched off, so if you're unsure of what you are doing I would suggest that you get an expert to look at it. BSH is the repair section of NEFF 0844 872 8999, the offer a repair plan, where you pay a set amount (Approx 170 pound) which covers your first repair and any further repairs for a year and you can pay by direct debit monthly to spread the cost. The inverter is approx 200 pound and the magnetron is about the same, so it's a pretty good deal as to replace the whole oven is 600-700 pound.

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In most cases when the microwave stops @ 23 seconds it's the Magnetron which has failed, and is shorting to earth.

Either that or the magnetron isn't getting the right signal from the inverter board. It gives it 20 seconds to get the right signal or it shuts itself off.

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1 Answer

Neff Microwave H5470SOGB


if appliance runs for approx twenty seconds this is nearly always a magnetron fault usually a cracked magnet or burnt out anode the electronics are detecting an unusual power fluctuation and shutting appliance down for safety you will need service tech to sort.

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