Sparking/growling NEW microwave

You probably fried the magnetron(it actually makes the microwaves that do the cooking). I bet you will find the magnet is broken(from excessive heat). There should be a diagnostic guide sheet somewhere inside the housing(due to running production changes,this is a guide for the pros to test the power supply,magnetron,etc with an ohmmeter to determine which is defective.

The magnetron is arcing in the interior and will eventually burn out. Check the inside for bare metal or food particals, if okay! the magnetron is breaking down and will eventually go.

This indicates three parts that can be the culprit, the magnetron "common problem" or the high voltage capacitor or diode, all three work together to heat food. Depending on the nature of the repair will determine the price for parts and labor and may approach the cost of a new one.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Basic Microwave Oven TroubleshootingTips

heatman101/'/'

you must !!!!!!!!!! discharge the capacitor first or it will kill you !!!!!!!!! use a discharge wand then cut out old diode and resolder new one ..

ps tell me why are you replacing the power diode in 15 yrs working with microwaves ibe never seen one blow

whirlpool microwave keep working when door open why

what's sparking... is it by the Magnatron window... or the carousel?...
If there is a carousel... take it out...
if its by the magnatron window,,, then...houston... we have a problem...
might be contamination... and that may require opening up the unit... sorry...
hopefully it's only something floating around in there that's causing the arc...

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/lisa_52daba487e5b4d53

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

hghg

What is your model number?

I do not know how to specifically replace the "inverter board" in this model. On most microwaves I've repaired, though, the hardest part is getting them dismounted from the wall if they are rangehood models. I suspect that the inverter board is held onto the chassis with two phillips screws, and all the connections thereto are modular and therefore easily disconnectable and swapped out. The great majority of times, manuafactureres do NOT put multiple connectors of the same pin count and oriention on a circuit board. Give it a go.