Question about Magic Chef MCD990R Microwave Oven
Our camper magic chef microwave is on but the buttons are not working. We have check to fuse and it is good.
Its a connection problem probally from a bump while driving the camper - you can dismantle the microwave yourself from the back and reconnect the jared wiring, or just replace it with an industrial one that can handle the camper abuse.
Posted on Jan 05, 2014
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Posted on Jan 02, 2017
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
SOURCE: Microwave won't Work
sounds like a fuse for starters, remove outer cover there will be a white cartridge appx 1"longX1/8"dia this is a ceramic fuse avail at most hardware stores in 15 or 20 amp configurations, if this blows again after repl suspect a faulty H.V. Diode/H.V. Capacitor, or the magnetron tube unless while inside unit you see something obviously wrong 2 fuses are under $5.00
Posted on Sep 27, 2009
Testimonial: "Thanks for the help! I'll try it and let you know."
HI. This is , indeed, an issue within the touch pad circuitry. it is damage, and will require replacement. I have located a replacement touch pad. Use the link below to access the touch pad. You can order the pad on-line, by clicking the link below.
Posted on Dec 23, 2009
I have a Magic Chef Microwave Model MC0153UB that is shutting itself off while cooking. I noticed before this, the light under the microwave blew during a storm. Do you have any suggestions?
Posted on Jul 22, 2010
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