Question about Magic Chef MCO160UB Microwave Oven
Plug works but it's an old house and if we plug in the fry daddy and use the microwave at the same time it always throws the breaker, I know we need to plug the other appliance into a different circuit, but this time I believe it blew a fuse in the microwave itself because it has always worked again after we shut off the other, just need to know where the fuse or fuses are in the microwave itself ??
Remember that micro wave ovens are fast cookers but power hungry items
do the maths and you will probably find that a fry daddy and a 1000 watt micro oven consume more power than the wiring will stand.
every time you throw the circuit breaker back on you create a power surge that is not good for micro oven boards.if if is still on when the switching is done.
Posted on Apr 26, 2015
Inside behind the display panel on a small circuit board.
Posted on Apr 26, 2015
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Posted on Jan 02, 2017
Fan turned on after cooking because a thermostat got to hot and tripped turning on the fan to try to cool the unit. The unit went completely dead when thermal fuse tripped which is located above the cavity on the left side.
Posted on Oct 31, 2007
SOURCE: Replacing the fuse of a MCO160UW
A microwave can be dead for many reasons.
It may be the fuse, which is usually located on the floor of the oven behind the control panel or between the door switches.
If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.
If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.
Then when it cools, it closes the circuit and allows power through again.
When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.
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 (or GFI) 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.
You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.
If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
There may also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.
We're happy to help you and we'd appreciate your thoughtful rating of our answer.
Posted on Jul 19, 2008
Tips for a great answer:
Either you have defected (weak) circuit breaker and wiring or bad Microwave oven.
The 99.99 % house hold Microwave ovens pull less than 15 Amps. They may have internal ceramic 15A fuse or 15 Amp internal circuit breaker.
To isolate your problem:
Plug your Microwave oven to different areas (different electrical circuit) if the different circuit breaker still trips... your Microwave oven has a short - Most of them has a small ceramic fuse 15 amps fuse.-also check some inter lock switches at door .
If the Microwave oven works Ok then you may have:
2a. You may overload the existing electrical circuit, try to unplug some other appliances
2b. You may have bad electrical outlet receptacle (Replace it with the same type , - may need helps from licensed electrician)
2c. Weak or defect house hold circuit breaker. (Replace it with the same type , brand - may need helps from licensed electrician)
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