E13
Sharp Door Sensing / Monitor Switch Error

Microwave shows E13 and interior light does not turn on when door opens.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failed door monitor switch, Misadjusted door latch assembly, Broken door hook, Wiring fault between monitor switch and control board

How to Fix / Troubleshooting

Safety: Unplug the microwave before accessing door switches. The door interlock system is a critical safety feature.

Steps:

  • 1. Check door operation: Open and close the door slowly. It should latch firmly without excessive play. If the door sags or does not align, the latch or hinges may be worn.
  • 2. Inspect hooks and strike: Look for cracked or bent door hooks and damaged latch openings on the cabinet.
  • 3. Access switches (advanced): Remove the cabinet and locate the door switch assembly. There are usually primary, secondary, and monitor switches. Identify the monitor switch per the Sharp service diagram.
  • 4. Test monitor switch: Using a multimeter, verify that the monitor switch changes state correctly when the door is opened/closed. Replace if it fails continuity tests.

Repair: Replace any defective door switch or damaged latch components with Sharp-specific parts. After reassembly, verify that the interior light and cooking functions operate correctly and that E13 is cleared.

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Repair Difficulty

Hard 4/5

Required Part

Door Monitor Switch
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