Microwave not turning on

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Possibility #1: Bad fuse

Fuse.png
  • Level of difficulty: Easy
  • Estimated time taken: 15 minutes
  • Tools required:
  1. Screw drivers
  2. Multi meter


How to:

Step 1: Unplug microwave

Step 2: Remove microwave cover

  1. There should just be a few screws holding on the cover
  2. Remove the screws and lift off the cover

Step 3: Locate your fuse

  1. Once your microwave cover is off, locate your power cord
  2. Follow your power cord until you hit the fuse holder

Step 4: Inspect your fuse

  1. A cylindrical glass fuse will produce a black burn mark in the middle
  2. Ceramic fuses show no signs of being bad and will need to be tested with a multi meter
  3. Ohms should read 0 when testing your fuse
  4. A reading of infinite means it's blown

Step 5: Replace blown fuse

  1. Simply remove the old fuse and insert a new one


Possibility #2: Door switch

MicroSwitch.jpg
  • Level of difficulty: Easy
  • Estimated time taken: 15 minutes
  • Tools required:
  1. Screw drivers
  2. Multi meter

How to:

Step 1: Refer to the picture to see what your switch looks like

Step 2: Inspect the outer switch

  1. There should be a little latch or hook that, when your door closes, the microwave pushes it and lets the microwave know that the door is closed and safe to start cooking
  2. Make sure this switch is not damaged or blocked by anything preventing it from operating correctly

Step 3: Turn power off to the microwave

Step 4: Label and remove all wiring leading to your door switch

Step 5: Test your switch

  1. Set your ohmmeter to measure resistance at the scale Rx1
  2. Touch one probe to the COM terminal and the other probe to the N.O. terminal
  3. Your meter should read infinity
  4. Leaving your probes in the same spot, press the latch on your door switch until you hear a click
  5. Your meter should now read zero

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