I have an Amana MVH210W Radarange microwave. All the power went out and I located the fuse and replaced it. After I turned it back on the power was back and lights and fans worked properly. However, when I used the heating, all the power went out again. I replaced the fuse again and the same thing happened. What went wrong with the unit?
The magnetron is more than likely the problem, or the inverter board if oven is 7 years old or less. If you have a digital meter you can do a rough test on the magnetron, unplug microwave, set meter to ohms, disconnect one wire from magnetron and put the test leads across too points, if reading is .2ohms or less it is good, but if the test shows infinity or open the magnetron is bad, keep in mind it may have a short making the reading misleading.
SOURCE: Instruction manual for 1986 Amana Radarange microwave
I think it will use a standard generic probe for the Accu-Temp. Sorry I couldn't help. Take care.
SOURCE: 1997 Jennair microwave M170W
If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If it goes dead or blows the breaker when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.
If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383
We're happy to help and we appreciate your thoughtful rating of our answer.
SOURCE: keeps blowing fuses
This problem is just like my own microwave, replace the shorted HV capacitor
SOURCE: Microwave Blowing Fuse. Fixed. After Day, Fuse Blows Again.
Hello there:
If you have all ready changed out the fuse and it has happned again i would first check to see that the fuse is the right one for the machine (i am sure that you did this but please recheck ) next i would look at the controle board as the next culprit it maay be failing expecially if there were any pops ar sparks that was noticed before the initial failure.
Also check to see if all of the wires by the board a re not loose or looked burned ar if there is any grease or anything like this around the area
And finally check to see if the plate is turning ok and not sticking cause this would cause the microwave to overload and it wil make every fuse you put in there fail after just a couple of uses ok
SO please try all of these things that i have explained to you
I hope this is very helpful for you.
Best regards Michael
SOURCE: No power. I changed fuse but microwave blows it immediately.
Be very careful! Standard microwaves have 2100volt capacitors and commercial ones 4000 volt capacitors.
*Decharge your capacitor(s) before doing diagnostics*.
You are now testing the high voltage side (as it works on convection). The main components are a transformer, a capacitor, a diode and a magnetron (havent seen a triac in a panasonic residential). If you have a proper meter that can test uf, decharge the capacitor, then test the capacitor, if it reads 0, you need a new capacitor (10$ used typically, 14$ new from ebay). To test the magnetron, decharge the capacitor first, remove the spade connections, test each leg to the frame of the microwave... if it shows measurable resistance, the magnetron is bad. The transformer is not something you test as I personally dont have a 4000 volt meter. If the diode, the magnetron and capacitor are okay, then the transformer is bad. To eliminate any other function, disconnect the low voltage to the transformer run a micropower cycle and check the fuse.
Hope that helps. My first instinct is the capacitor.
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