Question about Microwave Ovens

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I have a Appollo AAC24-BIB halftime oven. one of the 2 wires coming from the t stat arced and burnt off and burnt the connection off. Customer service sent me a new t stat and I put it together and ran it without the cover to test. I t was fine. I put the cover back on and it immediately blew circuit breaker and the micorowave fuse. The fuseable link did not blow. I along with tech service could not figure out problem . I tried to bypass the the tstat and the machine works on microwave and convection. Anyone have any idea whats going on and what problems I may have.

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The cover may be contacting the wires - this will complete the circuit and cause a short. You may need a new part - this time install and ensure that no bare wires are making contact with the cover.

Posted on Nov 30, 2014

Testimonial: "I did install a new tstat after the short and it still wont work unless I bypass"

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After many years of good service my Dimension 4 does not microwave. It goes through all the motions but doens not heat the food. the convection and grill functions are working fine. HELP!


Hi Michael,

i think something wrong with its high-tension circuit or your magnitron is bad.
the minor fault is open of therm stat for protection.
or burnt fuse in circuit.

regards,
nuwan.

Jan 09, 2014 | Panasonic NN-T888S Convection/Microwave...

1 Answer

Arcing sparking to carousel wheel. have 8 year old GE advantium 120 microwave oven. Was working just fine with a burnt out lightbulb but when I replaced the over head lightbulb it started to arc to the...


I think the problem is just coincidental to the lamp replacement.

i would say there is grease or food debris on the turntable support or turntable motor coupler.

The service manual is here and you can order parts from the Pros here.

Sep 23, 2013 | GE Advantium 120 Convection/Microwave Oven

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Arcing from the metal plate on the right side of the oven when anything solid is place in it - such as frozen foods or a cold stick of oleo or frozen biscuit. Goes off when I open the door.


That metal plate is probably the waveguide cover. It is made of Mica and must be kept clean otherwise it will arc and burn. The reason it arcs more when solid/frozen food are placed in the oven is because solid/frozen foods do not absorb as much energy as wet foods.
Replace it if it is burnt.

Dec 20, 2010 | GE Microwave Ovens

1 Answer

Sparkscome from food (no metal involved) and heating VERY quickly!


Arcing in or above oven chamberThere is often a simple cause:


  • Arcing in the oven chamber with a normal load (a cup of water, for example), often just indicates that a thorough cleaning of the oven chamber is needed, particularly around and inside/above the waveguide cover. Any food that gets trapped here will eventually burn and carbonize resulting in a focal point for further arcing. Usually, the waveguide cover is designed to be removable without taking the (cabinet) cover off of the oven. However, burnt food and carbon often make this difficult so that some disassembly will be required. See the sections: "SAFETY" and "Getting inside a microwave oven".
for more information see "Arcing in or above oven chamber" section of online Microwave Repair Manual.
If the microwave is clean, please post a reply and I will look at it again (this time include a model # and/or approx manufacture date)

Oct 21, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

There's no high voltage ,thus no magnetron activity


check the ceramic fuse in the primary circuitry as it probably blew out when the primary connection arced and burned through

Mar 23, 2010 | Magic Chef MCD1110ST Microwave Oven

1 Answer

Splashes inside waveguide?


Quite often this is due to grease or food particles stuck to the inside of the oven or stuck on or behind the waveguide cover.

The waveguide cover is usually about the size of a playing card and often held in place by a plastic rivet.

In some models it is the plastic ceiling.

It can be fragile, and the metal edges of the oven behind it can be sharp, so be careful!

The cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.

If the cavity metal of the oven is chipped or charred, it will have to be sanded smooth and clean and dried thoroughly.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

If your waveguide cover is burned, it will need to be replaced.

If you need more specific help, please reply back with your brand and full model number.

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Feb 01, 2009 | GE Advantium SCA2000B Microwave Oven

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Sparks, noise and burning smell


If it is burning and arcing at the antenna, it is probably arcing in the wave guide area. Probably will have to replace unit. I have had some success by removing the antenna, sanding and repainting the burnt areas of the cavity and sanding off any burnt marks on the antenna. Need to look at top of mag to see if also arcing there too.

Jun 16, 2017 | Panasonic NN-2555A Microwave Oven

1 Answer

Interior Scratch


scratches can cause arcing but they are easy to deal with.
touch up paint is available from any appliance parts supplier check your phone book or order online

Jan 13, 2008 | Frigidaire GLMV168K Microwave Oven

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