Fuse whenever i start my micro wave it always blow the fuse I replace fuse but blows when start up happens

open and look for blow fuses

Johnny Appleseed.. hello,

Thnx for all that good nutrition (X-ell-ent companion to cheese)!

Before we start...
An annoying little know trivia about micro-waves...
If used for EMPTY or for softening single pats of butter
they will soon self destruct (eat themselves... burn-out... fail).

When they do... their "micro-wave-generator" (magnetron) will
consume much more energy and cause the primary (most likely solitary fuse to operate)... "blown fuse".

Would that you had included a model number... (but alas).

Looking up your own model number on eBay or better GETTING your REAL PART NUMBER off of your original parts sheet will allow you to shop for the VERY BEST PRICE.

Sears has an excellent reference library... but if you want the same part you can get everywhere else for the HIGHEST price
SEARs ($$$$) is your place... (3 estimates... always!).


Don't forget to get that SPARE FUSE...!

Happy hunting.

appliancepartspros...
Search Over 2 1 Million Appliance Parts

- repairclinic.com
- ezapplianceparts.com
- partssellect.com

This is usually due to faulty protection switches in the door. All microwave ovens are designed so that if the unit is busy micro-waving, and you somehow manage to open the door, it will immediately blow the fuse. The switch/s may have come loose from their mountings. Be very careful, because this can be very dangerous if you don't know what you are doing. Rather let an experienced person take a look.

Maybe... Did you check the high voltage diode?... A shorted diode keeps the fuse blown... Ty

Chek the H V fuse,Diode&Magnetron

micro waves use a tube inside that generates micro waves and like a light bulb they eventually blow out. the tube is not considered replaceable and cheaper to just get new unit.

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.

I am not an expert on Miocrowave ovens, but from past experience I know that they have a number of micro-switches on the door as safety devices. If these switches are faulty, the last safety feature is to short the supply and blow the fuse to stop the microwave from operating in an unsafe condition. Obviously the switches would have to be checked first before jumping to any conclusions and a number of other faults would probably cause the fuse to blow as well.

after blowing the fuse?..what happened next?...did you replaced the fuse and it start running again or if you replaced the fuse, it will blow again?

if it is always blowing the fuse, you may have a shorted diode in between the high voltage capacitor. you could remove that just to test if the fuse would no longer blow and if it would heat.

if it did not blow anymore and it did heat the ffod or water, then you all need to raplace that diode between the high voltage capacitor.

if the fuse did not blow anymore and it is still not heating the food , then you might have a faulty magnetron.

if it still blow your fuse then you could have a shorted magnetron, a shorted diode which is the one from the capacitor to the ground( this is anothere diode besides the one installed between the terminals of the high voltage capacitor) ( don't interchange them, they have different puposes..) or shorted capacitor also.

use a regular ohmeter to test each part...

i hope you can solve your problem with these instructions....

good luck,

drcool

If it blows the fuse as soon as you hit the START button, it's almost certainly a shorted high-voltage capacitor.

If it blows a few seconds after you hit the START button, it's probably the high-voltage transformer. You'll possibly also smell a faint electrical burning smell from the rear vent after you shut if off.

If it blows the fuse as soon as it's plugged in, you probably have a shorted door switch, a shorted varistor, or an internally exposed wire shorting to the chassis, etc.