I have checked the door switches all are working properly.the m/wave will start and run with heat for any where 5 minutes to a day of useing it then it will blow the fuse and trip the breaker. the tech i bought the fuses from said the door fuses would make it blow the fuse. so i ohmed them and all check out.why would it work more one day and blow quickly on other days? i have put 5 fuses in it 2 after checking door switches any ideas thanks
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Re: deawoo model wm1310pm blowing fuses
It's important that the door switches are clean, solidly mounted and operating smoothly.
Sometimes as a switch ages, goes bad, or gets clogged with grease, it can be "laggy", and can allow a short that can blow the fuse and/or breaker.
They can certainly be intermittent.
Since it's blowing the breaker too, that usually indicates door switch trouble, so the door switch mount may be loose or broken.
Beyond that, there is a chance that your magnetron or high voltage transformer is going bad, but I strongly suspect a door switch, mount, bent door, etc. first.
If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk
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Fuse holders sometimes become weak due to heating. If the fuse is not held very tightly by the holder, the fuse will blow because it gets hot, not because the current exceeds the fuse's rating. If this is the case, replacing the fuse holder would be in order. This is not to be confused with the situation where the fuse blows when the door is opened or closed. In that case it's a door switch sequencing issue, or a bad switch.
There are fuses in the unit but why did they go bad? something else has to go bad to cause the fuse to blow, unless the fuse got old or had bad connections at the fuse holder. Can try a new fuse then run and see if it works. Just don't run it empty, just put a container of water in it to test. If it works check all connections and see if any are loose or browned like it has been hot. That's where your problem will be.
It doesn't work at allIf your microwave oven doesn't seem to work at all, check these:FusesDoor switchFusesUsually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it.Door switchIf the fuse isn't the problem, check the door hooks and the door-release button. When these are broken, the door switch doesn't activate, so the oven can't work.It sounds normal, but there's no heatWhen the microwave sounds okay, but there's no heat, one of the internal door switches, the high voltage circuitry, or the circuit board may have a problem. To resolve this problem, you need the assistance of a qualified appliance repair technician.
This microwave has three door interlock switches and a fuse that are easily replaced by the consumer. Unplug the microwave. Remove the cover by unscrewing the 5 screws on the cover. Four are on the back, one on the lower right. One or more of the screws may be torx T15S (security)(bit available at hardware stores). As in all microwaves the capacitor should be discharged by shorting the cap terminals together. Note that the three switches are in a single black plastic carrier. Remove the two screws securing the carrier and the switches can be released by hand. Replace one at a time so as not to confuse the wiring which is push on spade terminals. Replace the fuse with a 20 amp 125v slow blow (radio shack). Do not plug in power until all the switches are reinstalled as a safety feature will cause the fuse to blow again. If fuse blows repeatedly it is most likely that all three interlock switches are not closing properly. Check to make sure that all switches are seated correctly in the black plastic switch carrier and that the 2 carrier screws are tight. Observe the switches as the door is closed. Replace switches and/or carrier as needed. While the cover is off you may want to clean off the fan and/or replace the bulb. Also check for proper seating of the control board connections.
If you have no power in the microwave, check to see if the outlet is good
by plugging something else into it. If there is power, you may have
blown the internal thermal fuse, or the door switch may be defective.
Either of these will keep your microwave from working. The thermal fuse
protects both you and the oven by blowing if there is too much power
going through it. When a fuse blows, it means that the wire inside that
conducts electricity has broken, usually because of an electrical overload.
When it blows, you need to have a professional microwave repair person
replace it. If this is not the problem, it may be that your door switch
has become defective. If the door switch isn't working properly, it
won't let the circuit complete to operate microwave components.
I am not an expert on Miocrowave ovens, but from past experience I know that they have a number of micro-switches on the door as safety devices. If these switches are faulty, the last safety feature is to short the supply and blow the fuse to stop the microwave from operating in an unsafe condition. Obviously the switches would have to be checked first before jumping to any conclusions and a number of other faults would probably cause the fuse to blow as well.
The Interlock Monitor Switch is an added safety check on the Primary and Secondary Interlock Switches. If the Primary and Secondary Interlock Switches allow the oven to operate with the door open, the Monitor Switch will blow the fuse.
You can get more information about adjuting the interlock switch from this link
You have a short in the system. removeing the fuse was not a good thing to do. The fuse in a microwave helps keep the system from an overload which can and I have seen this blow-up. The micro pump inside might have a dead short it,