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How to replace the main fuse on my Kenmore microwave

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SOURCE: fuse blew microwave

Sounds like a fault on the magetron power supply.

If you are confident enough to ground and discharge the main capacitor, check to see if it is faulty.

Check for arcing or scorch marks around the transformer and check the HV lines on the magnatron input for continuity.

If the capacitor has blown out, this can be replaced, however if the magetron or transformer is faulty this is a much more complicated repair and should only be done professionally.

Posted on Mar 25, 2010

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1 Answer

How do I replace the fuses?


You have to take the cover shell off and locate the fuse.. Its a main power fuse.. will be near where the power cord comes into the microwave.. while you are there look for burnt spots around the board and wires and door switches.. some thing made the fuse blow.. I had this problem a couple of microwaves ago.. it would happen every 3 months.. i bought a pack of fuses and taped them inside the shell so i would not have to go to radio shack everytime i needed one..I never did find what ws blowing the fuzes.. possibly the inverter??

May 04, 2014 | Kenmore 62622 Microwave Oven

1 Answer

Kenmore spacemaster microwave Auto recipe 300 will not light up or do anything at all


Dead appliance, power on wall outlet.

YOUR SAFETY IS PARAMOUNT!

Attempt this only if you are competent.

If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

Mar 31, 2011 | Microwave Ovens

1 Answer

How to change the fuse in a kennmore microwave


Dead appliance, power on wall outlet.

YOUR SAFETY IS PARAMOUNT!

Attempt this only if you are competent.

If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

Feb 27, 2011 | Kenmore Microwave Ovens

1 Answer

Okay you said it was probably a fuse so where is the fuse located?


Dead appliance, power on wall outlet.

YOUR SAFETY IS PARAMOUNT!

Attempt this only if you are competent.

If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

Feb 19, 2011 | Kenmore 63792 Microwave Oven

1 Answer

I have a 20-yr-old microwave--a kenmore 565.8824581--that just suddenly stopped working. no lights, nothing. offhand do you think this might be a fuse issue that is fixable, or would this simply warrant...


Dead appliance, power on wall outlet.

YOUR SAFETY IS PARAMOUNT!

Attempt this only if you are competent.

If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

Jan 21, 2011 | Microwave Ovens

1 Answer

Microwave won't start


If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

Dec 29, 2010 | Kenmore Microwave Ovens

1 Answer

Fuse blew microwave


Sounds like a fault on the magetron power supply.

If you are confident enough to ground and discharge the main capacitor, check to see if it is faulty.

Check for arcing or scorch marks around the transformer and check the HV lines on the magnatron input for continuity.

If the capacitor has blown out, this can be replaced, however if the magetron or transformer is faulty this is a much more complicated repair and should only be done professionally.

Mar 22, 2010 | Microwave Ovens

1 Answer

Kenmore Spacemaker Fuse Blown


its either a 10-15-or20 ceramic fuse and its marked on the side of the fuse or take it to the hardware store they have this type of special fuse.and they can locate the rating for you

Oct 04, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Everything works except it doesn't heat anything


no, just 1 main fuse for everything. there are temp safety devices though, and door closed safety switches. Most likely failure though is the magnatron.

Dec 30, 2007 | Kenmore 64002 Microwave Oven

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