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Service Need to find the value of the main fuse

Posted by cross1926 on

  • William Miller
    William Miller May 11, 2010

    In the US, they're usually 20 amp ceramic fuse, but please reply back with your brand and model number so we can help you.



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It should be marked on noted on a tag near the fuse holder, but commonly it;s 15 or 20 amps, and it should be ceramic (white or gray).

Posted on Aug 21, 2008



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If you have the old fuse, the voltage and amperage is stamped on one end of the fuse. You may need reading glasses to read it because it is about a 4 point font!
On my GE JMV2070 there are two fuses, the main is 250V 20A and the HVT is 300V 30A. These values are also stamped on the fuse holder.

Posted on Aug 04, 2010


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1 Answer

My ge microwave model no. Jes1451bj02 just stop working no power on any think

check fuse.if blown replace with same value fuse.if it blows again you have a problem which will require service by qualified person.

Jan 18, 2012 | GE Microwave Ovens

1 Answer

We have a Hotpoint RVM1435WJ01 above the range microwave. We lost our electricity one day due to an outside electric wire splitting - when the electric company fixed the wire, the power came back to...

A mains surge may have taken out the fuse. To find the fuse, remove it from the mains, remove the outer cover and follow where the power cable enters the case. There will be a PCBoard with a fuse on it.
Always replace the fuse with one of exactly the same type and value!

Mar 21, 2011 | Hotpoint RVM1435 Microwave Oven

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My problen is the mico is just a tad over one year old and the timer is working and the light is on inside, but tray is not turning and it is not heating up, could it be a fuse?

I would think it possible.
Remove the outer cover when the machine is unplugged and follow the mains lead in through the rear panel. There should be a couple of fuses nearby.
Always use the correct value fuse of identical type and size!
Hope that helps.

Feb 18, 2011 | Emerson MW8102SS 1100 Watts Microwave Oven

1 Answer

G E microwave, installed in cabinetry. No power whatsoever. All power sources are good. How do I diagnose?

Ensure the power is disconnected, remove the case and follow the mains lead route in, through the case. At the end of the mains lead there will be a PCBoard with one or two fuses on it.
Check the fuses and if needed replace with the same value and type.
Hope this helps.

Nov 02, 2010 | GE Microwave Ovens

1 Answer

My micro turns on but won't heat up.

Two possible causes.

Has a broken fuse. remove outer cover and replace heavy duty fuse. Rassemble.

If the fuse is intact, the microwave lights up but does not heat then the main engine is damaged. Sometimes if nothing works including the lights it is a safety shutdown that will recover once the unit has recovered from an overheat. Make sure there is a good airflow and the oven is not overheating because its in a hutch or too close to the wall, reducing airflow.

Repairing a Magnatron, often exceeds the value of the unit. Microwaves can be bought second hand from pawnbrokers now cheaper than repairs.

Thanks for using FIXYA

Apr 13, 2010 | Amana HDC12 Microwave Oven

1 Answer

No lights - no power - DEAD! Worked fine an hour earlier now ... nothing. Check fuse in mains box - all OK - tried it plugged into another outlet... nothing.

Your unit is dead, mains are good, tried in other receptacles, still no power. You have a bad fuse inside the unit. Unplug. Remove the cover. Generally this requires removing all the screws on the back perimeter and lifting the cover up. Sometimes they stick due to old grease, etc. Somewhere in the area of where the power cord comes in or near the transformer there should be a small fuse in a holder. It is not a glass fuse and should be replaced with the same kind (ceramic) and value. This is important for future protection. You can get the fuse at . Get a box of five for future problems. If this was the only problem your microwave should work. If it blows the new fuse you could have a shorted power transformer, bad high voltage diode, or a bad magnatron in that order. There could also be a short in the board with the display but that would be unusual. Let me know if you need anymore helpl


Thanks for using FixYa

Feb 26, 2010 | GE Microwave Ovens

2 Answers

The power just quit in the middle of operation. I checked the the socket and it has power.

You will need to pull the back panel off and check the main fuse in the system to make sure that the fuse did not pop. Also if the side of the unit or top got hot during operation that is a sign of a more serious problem and it would be better to just get a new system. Repairing these can be very expensive if it is not a simple issue. Also while you are inspecting the fuse, check to make sure all the wires are tight, and there are no bare wire showing.

Jan 02, 2010 | GE Microwave Ovens

1 Answer

Does not heat

problem is the fuse to the magnatron has blown or the magnatron needs replacing remove the outer cover three or four crosshead screws you'll see a pc board with a white fuse on board try changing it read th fuse value on fuse base don't connect the mains plug with the cover off.

Oct 28, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Amana mvh230 microwave

Hi there!
The magnetron has probably failed. Check the High Voltage Diode for short circuit. Replace protection fuse with same value. The Diode is standard on most microwaves. Magnetron to be replaced with the same profile and wattage. Be sure to unplug Mains before opening the unit. Good Luck, JUS004

Feb 28, 2008 | Microwave Ovens

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