How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Bryan Your Own Question
Bryan, Home Appliance Technician
Category: Appliance
Satisfied Customers: 12156
Experience:  15 yrs. experience as a certified appliance technician.
Type Your Appliance Question Here...
Bryan is online now
A new question is answered every 9 seconds

We have a adavatium microwave oven It smells and does

This answer was rated:

We have a adavatium microwave oven It smells and does not heat the door switches are good what else should i look for ?

Hello, Thank you for using this service, I will be helping you with your problem today

does this smell like plastic heating up and melting ? kinda of an electrical / plastic burning smell ?

Customer: replied 4 years ago.


okay perfect. the issue is the high voltage diode, Diode WB27X10330 Main Product Viewthis is a common failure on this model. the real problem is these are very dangerous to replace. it is part of the high voltage side of the microwave where the high voltage capacitor can store a lethal amount of voltage even with the microwave unplugged. please be safe if your not sure you can replace this and call a tech to replace it. the part is around $35.00. hope this helps, thanks and well wishes, Bryan
Customer: replied 4 years ago.

how do you discharge the capacitor? where is the capacitor located ? Where is the diode located

the capacitor is part # XXXXX on the diagram and the diode # XXXXX they are located behind the control panel. to discharge you need to ground the capacitor (usually with a long well insulated screw driver) the diode is located connected to the capacitor and then to a ground on the body of the microwave. please be careful doing this if you choose to repair it yourself, be safe, thanks, Bryan
Customer: replied 4 years ago.

the capacitor has two terminals ground either one ? how can you tell when the diode is bad ?

in most cases you can smell the diode once you remove it . it will have the same smell as when you smelled it while running. yes you can ground either terminal.
heres a video on how to test the diode if that helps.
Customer: replied 4 years ago.

The diode tests good 65

okay, you need to look at the boards and see if any have burns or melted area's on them. check the relay board. Relay board WB27X10334 Main Product Viewand the main control board. Main Control Board - Part # XXXXX Mfg Part # XXXXX pay special attention to the diodes and transistors on the boards.
Customer: replied 4 years ago.

they look good

well you are down to a bad magnetron unfortunately. its the only other thing that would smell like that. theres no way to really test the magnetron itself safely. Magnetron WB27X10327 Main Product Viewthe part number is XXXXX you would need to search on line for a replacement. both my usual parts suppliers say out of stock.
Bryan and 6 other Appliance Specialists are ready to help you
Customer: replied 4 years ago.

I did remove the magnetron the white connector has a small burn spot on it with like a wire showing through it I think that is the problem ? Have part on order hope I can put this monster back together part was 49.00 free shipping Part is coming monday Thanks

okay it sounds like thats the issue. if its burnt then something is bad in the magnetron. hopefully everything works after you replace it. let me know, thanks , Bryan
Customer: replied 4 years ago.

New meg still does not work. Smell is gone but does not heat on micro. On speedcook the lights come on and it heats a little, what next ?

thats hard to say at this point. these are dangerous to try to test as far as the high voltage side, it really needs to be checked by a tech at this point, please don't try to test any voltage on the high side its dangerous and can be deadly,be safe and call for service.
Customer: replied 4 years ago.

I took the control panel back off and found that secondary interlock relay (rY2) had come apart, can that be bypassed with a jumper to see if it will heat then. Can just the relay be replaced or do you need to replace the board. What are the possible problems on the high side , I am an auto tech and deal with high voltage every day.

unfortunately you can bypass the relay, this would send power to the magnetron at full power and even possibly with the machine off, I cant be sure on that. as far as replacing the relay itself on the board the only way is if you can find the relay which they don't sell. on the high end check the thermal fuse on the side of the magnetron for continuity, it should have continuity all the time. remove one wire from it to isolate it .
Customer: replied 4 years ago.

what is the part number for the board ?

Manufacturer Number WB27X10358
Customer: replied 4 years ago.

The thermal fuse tests good . has continu with ohm meter What else ?

how much is a board ?

Customer: replied 4 years ago.

ok thanks gone till friday will let you know

your welcome. have a great day . thanks , Bryan