Blows fuse high voltage capacitor bad

SOURCE: how to test high voltage transformer

#1 Turn off and un-plug the unit for 20 minutes

#2 There is as real risk of electrocuting yourself.

#3 Short the capacitor wit a screwdriver. BE READY for an arc or pop.

#4 You need a special high voltage probe to measure the high voltage. We're talking THOUSANDS of VOLTS here DANGER -DANGER - DANGER!

#4 If you want to try, you first have to DISCONNECT the capacitor from the circuit.

#5 DON'T re connect the power. Measure the resistance of the SECONDARY of the transformer (one lead goes to the capacitor). TELL ME WHAT THE MEASUREMENT IS..

#6 The rectifier could be bad (which is connected to the Capacitor) Usually - if one of th components is bad, it'll blow one of the internal fuses.

SOURCE: GE SCA1001KSS 02 microwave blows fuse.

this is a list of possible causes. Defective interlockswitch or misaligned door, shorted HV capacitor, shorted HV diode, these are top three things that will cause the main fuse to blow when you start the microwave. the humming you hear is from the diode or magnetron. To be safe you have to discharge the HV capacitor here is what you'll need and how to do it. You will need a resistor 100K ohms 25watts or a a string of smaller ones to add up to that. Solder one end of the resistor to a well insulated clip lead of 2 to 3 ft. long.Solder the other end toa well insulated contact point as a #14bare copper wire about 2 inches long and secure the resistor to a piece of 2ft pvc pipe with electrical tape clip the other end of the clip lead ground to a unpainted spot on the chassis of the microwave and use the pvc pipe as a handle and touch each side of the capacitor to discharge a couple seconds at a time switching back and forth. after a minute or so take a well insulated screwdriver and touch each side of the capacitor at the same time and if you have no arcing, popping and such it is safe to take off and replace