A dead microwave can be a tripped breaker, a door that is not registering, or a real internal problem. Work through these safe checks in order before booking.
You press Start and nothing happens, or the display lights up but the cavity stays cold and silent. Start with the cheap, safe possibilities and move toward the serious ones. Never take off the outer housing at any point in this process.
Check that the breaker feeding the microwave has not tripped. For a plug-in unit, plug a lamp into the same outlet to see whether it is live. A loose plug or a dead outlet explains more dead microwaves than most people expect.
The unit will not run unless it believes the door is shut. Open it, remove any crumbs or packaging bits near the latch, and close it firmly. If the screen shows E3, the door system is the place to focus.
If the panel is lit but starting does nothing, look for a code. Two common ones are E2 and ER11, and each points to a specific repairable problem rather than a mystery.
If you notice any of these, unplug the microwave and call. Do not run another test.
Write down what the display showed and what you tried. That short note saves time during the visit and helps the technician go straight to the likely cause.
A microwave that passes every check above needs a look inside by a technician. Learn what happens on a microwave repair visit and schedule a technician when you are ready.
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