Re: What material is usually used to transfer heat around...
Water. Water is a good conductor of heat. The boiler heats the water, a pump circulates it around the system and through the radiators where it loses heat. Cooler water returns to the boiler for re-heating. http://www.waermecenter.de/
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Unfortunately when the microwave stops heating and everything else still works, this means your magnetron shorted out. The magnetron is the part that heats the food and also is the most expensive part. It is almost cheaper to buy a new microwave and taking into account the hassle of replacing the magnetron, I recommend just getting a new microwave. Let me know if you need anything else.
Benjamin
The magnetron (the part that heats the food) may be bad or the circuitry to the magnetron may have burned out. Basically my advice is that if you have no electrical expertise, it isn't worth fixing. The magnetron if bad, costs almost as much as a new microwave. If you open it up (make sure it has been unplugged for a few hours and don't seen any obvious burnt parts, then most likely the magnetron is done and a new microwave is the way to go.
Generally the magnetron (the part that heats the food) is the cause if everything else still works. Unfortunately replacing the magnetron is barely cheaper than buying a new microwave though you can check out repairclinic.com to decide whether you want to attempt replacing the part.
you need a new microwave. There are no heating elements in mocrowaves just micro-waces. It only heats moisture it does not heat objects. It is to dangerous to replace the actual device that heats liquids.
Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.
The cost of the magnetron is about 95% of the cost of a microwave oven.
Most people don't, for this reason, replace the magnetron, they replace
the whole oven which is probably what you will end up doing.
There is a possibility that the circuit that provides power to the
magnetron is faulty and you need to take it apart, find the proper
electrical leads and test them with a volt meter. To do this you have
to remove it from its mounting and take it apart. It is a fairly
lengthy process however.
Magnetron probably the cause, not worth fixing in most cases. You are better off buying a new microwave because the cost of fixing isn't that much better than buying a new one usually.
This just happened to ours as well. Apparently the magnetron (device that creates radio waves that heat the food) is broken. I'm trying to pry the darn thing out of our kitchen now so I can replace the magnetron. Look for this part WB27X10489 on Google. I found it on ebay for $65. If it fixes the problem I'll post again.
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