Question about Neff H7871N2GB Convection / Microwave Oven

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Microwave blowing fuses when setting programme

When selecting microwave settings display gose off when check found fuse inside blown replaced fuse still blows. oven mode works still works . only micro at fault.

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Suspect high tension diode or bleed diode faulty. easy to replace but!!!!!!!!!!!!!!!!!!

BE CAREFUL. THERE ARE VERY HIGH VOLTAGES PRESENT IN A MICROWAVE. YOU MUST SHORT CIRCUIT THE CAPACITOR WITH A GOOD QUALITY SCREWDRIVER IE GOOD INSULATION. VOLTAGE CAN BE UP TO 1500 VOLTS AND IT CAN KILL.

IF YOU ARE NOT SURE WHAT TO DO, GET SOMEBODY IN

Posted on Jul 05, 2008

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Normally, if it was running and the fuse blows, it is then an electrical/electronic fault. If you simply woke up to the fuse being blown, then very possible it is only the fuse from a cocoaroach or the like.having gone onto a live part of the circuit. Pull the plug out and remove outer cover. Locate the fuse on the board where the power wire comes in and replace for the same value (normally 12 amps).Switch on and try with water in the microwave. Please stand clear when testing as the power is huge in the system. If it blows again, really, get a technician that knows what to look for when trouble shooting. 50% of the time it is the capacitor and HVdiode. Other 50%of the time it is the magnatron. Careful testing can ensure the right part first time. Microwave is one of the most dangerous appliances next to a tv set that i have found.

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The fuse is located inside the microwave. You will need to remove the front panel to get to it. It will be located on the black power wire inside the microwave and installed inline. Make sure that the microwwave is unplugged before removing the front panel. Once you locate the fuse inside you will need to remove it and test it with a continuity tester to see if it is blown. If it is make sure you replace the fuse with the same amp rating you found. If the new fuse blows again then there is an electrical short somewhere inside the microwave.

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No power to microwave


Hi

When your microwave oven doesn't work at all, it means interior fuse inside the microwave has blown (usually a part inside the microwave makes this fuse blow). Sometimes a bad fuse holder inside the microwave cannot hold the fuse tight enough and the fuse will blow as well. If the fuse isn't the problem, check the door hooks and the door-release button. When these are broken, the door switch doesn't activate, so the oven can't work. It can also be due to a stuck or faulty door switch which might have blown the interior microwave fuse.

Please do rate the solution and revert for further assistance.


Thanks
Rylee

Sep 14, 2009 | Microwave Ovens

2 Answers

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Jul 29, 2009 | Microwave Ovens

1 Answer

Microwave wont run, displays E 10 on the screen and also microwave fault, press stop to acknowledge, just changed the door.


e 10 is the internal safety fuse has blown this often happens if door is altered for any reason moving the door can effect the setting of the monitor switches these are set to a high tolerance to avoid operation of microwave with door open changing the door has shifted these settings and blown the fuse, replacing the fuse may be enough to get it going but it should be checked for leakage.

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1 Answer

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Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
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Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
 
Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
 Q - My microwave went dead when I opened the door ( same problem as closed the door ).
A - This often is a stuck or faulty door switch and it has blown the interior microwave fuse.
 
 
Q - My microwave is completely dead.
A - House fuse has blown or interior fuse inside the microwave has blown ( usually a part inside the microwave makes this fuse blow ) Sometimes a bad fuse holder inside the microwave cannot hold the fuse tight enough and the fuse will blow as well. 
 
 
Q - The fan in my microwave oven is not running will this hurt my microwave?
A - YES, the fan cools the magnetron and electronics, take the microwave in for service, most fans are not too expensive to replace.
 
 
Q - My microwave blows the fuse inside itself as soon as I push the start button.
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1 Answer

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You say when you "power on" the fuse blows? If that means when you hit the START button to cook, then you probably have a shorted high-voltage capacitor. If you mean it blows when you plug it in, you probably have a shorted door switch. Your microwave may also have a wiring diagram pasted on the inside of the outer wrapper or in an envelope. That will help in your tests.

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