4 years old eveything works but all of a sudden when you turn it on it makes a loud humming noise, like it is running hard, then you can smell a odor like hot wires or something hot - it does not heat up the food --should i just throw it out or can i change a fuse or something? hanks marsha
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Re: makes loud hum and faint smell when turned on
It sounds like your magnetron failing.
If a fuse were blown, it would be totally dead with no lights, no display, etc.
Keeping it out of the landfill a while longer by getting it fixed is always an option.
it's within the magnetron portion of the warranty (usually 5-9 years)
but out of the original full warranty (usually 1 year), then your
manufacturer will cover the part cost, but not the cost to visit you or
the labor charge to do the work.
Goldstar / LG / L.G. help, call 1-800-243-0000 (M-F, 7am-8pm CT, Sat
8-5 CT) and choose the appropriate prompt from the menu or visit here.
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From your description it sounds like the magnetron has failed in this oven. That's the part the makes the microwaves to heat the food. It typically fails by shorting out and making a loud hum noise. It not usually worth fixing since the price of a replacement magnetron is almost as much as a new oven.
Often over the years the Transformer laminations can loosen, from the on/off rising and collapsing magnetic fields, and then they sorta hum louder. I suspect this is what is going on. Shouldn't be too much of a worry.. keep an eye on it tho.
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This can be caused by grease etc. inside
the oven and on the wave guide which is the paper like thing in the oven. If
you can remove it look for burnt areas which may can be scraped off or you may
need to replace it. An appliance parts store usually has the material you can
cut to fit you own.
the magnetron the unit has gone bad.sometimes there is burning smell as u mentioned.it is little expensive repair arond $ 150.00.find out the price of new unit plus iistallation/delivery chg and then make a decision.
You either have a bad magnetron tube (5 or 10 year parts warranty item through GE Factory Service 1-800-432-2737 or www.geappliances.com) or a shorted high voltage rectifier. I think the light being out is a secondary problem.
Almost certainly, the component called the "magnetron" has died. This is the valve (tube in the US) which actually generates the microwaves. The loud humming is the transformer that supplies the magnetron being overloaded and/or the magnetron itself.
If the rest of the appliance is OK and not too old, the magnetron can be replaced. If you aren't familiar with these appliances, you *must* get this done by someone who understands the dangers of messing with them - if you get it wrong, they can bite! In some countries, only qualified engineers can buy the spare parts.
In the UK, the part costs around £40 - £80, depending on the model.
If the appliance is more than around three years old, it may be a false economy to repair it as other parts may fail soon after the repair.
Sounds like you just fried your magnetron. Normally when they go bad, they make a very loud noise like what you described. The smell concerns me because you may have ruined the waveguide as well. If the magnetron burns through the protective painted surface of the waveguide, the waveguide is ruined. In most microwave ovens this means replacing the entire unit because the waveguide is not replaceable. Putting a new magnetron in a damaged waveguide will result in the same arcing and eventual failure. In addition to the magnetron, the following components are part of the same high voltage network:
Magnetron Thermal Cut-Out
Any one of these components could have also been damaged. I DO NOT recommend taking any voltage measurements inside the HV network. Potentials of over 4000 volts can be reached and make it very dangerous for the do-it-yourselfer. Taking resistance readings with the unit unplugged is strongly encouraged. If you decide to pursue a repair, inspect the magnetron tip and inside of the waveguide first. If the magnetron is melted and/or there are burn marks inside the waveguide, a new microwave may be a in order. This actually may be a better option than an expensive repair. I hope you find this advice helpful.