Why did the sensor overcook my food?
Most often because the food was covered too tightly. The sensor needs steam to reach it. Food sealed under clingfilm or a lid with no vent traps its steam, the humidity in the cavity barely rises, and the sensor can misjudge how far the food has cooked. Cover food loosely, with a vented lid or a cover resting rather than sealed, and the sensor works as intended.
My microwave lights up and turns but does not heat. What is wrong?
Often a failed door interlock switch rather than a dead magnetron. Every microwave has switches that confirm the door is properly shut, and they take a beating with daily use. Closing the door firmly rather than slamming it helps them last.
What is the one thing that kills a microwave?
Running it empty. The energy a magnetron produces has to be absorbed by something, normally the water in food, and with nothing inside it reflects back into the magnetron and can damage it. Never run it empty, never run it just to test it, and put a cup of water in alongside anything very small and dry. In a shared kitchen it is worth saying out loud.
Do packet instructions work with a 1000-watt microwave?
Check the wattage printed on the packet against this oven's 1000 watts. If the packet assumes a different wattage, the times will be off, so watch the first few attempts at popcorn or ready meals rather than trusting the box. The ten power levels help: a lower setting gives gentler, more even heating rather than simply being slower.
Does it need its own electrical circuit?
It is sensible to give it a circuit it does not share with other heavy appliances. Toshiba lists a 1600-watt input on a 120-volt supply, so running it at the same time as a kettle, a toaster or a space heater on the same circuit is how breakers trip. That input figure is also why it can sound more powerful than its 1000-watt output.
Can the beeping be turned off?
Yes. Hold the 8 key for 3 to 5 seconds and the buzzer switches off after a long beep. It is a real asset if you heat food late at night, though you may need to set it again after a power cut.
