RCA Intermittent Door Switch or Overheat Protection

Microwave runs for a few seconds then shuts off with no code; may restart if door is opened and closed.

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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

Loose or worn door switch, Weak door latch not holding switches engaged, Overheating thermal cut-out opening intermittently, Failing control board

How to Fix / Troubleshooting

Safety Warning: Unplug the microwave before accessing door switches or internal components.

Steps:

  • 1. Observe pattern: Note whether shutdown occurs at the same time each use or only when the door is jostled.
  • 2. Check door fit: Ensure the door closes firmly and does not wobble. Gently press on the door during operation (without blocking vents) to see if it prevents shutdown—this suggests a door switch issue.
  • 3. Allow cooling: If shutdown occurs after longer runs, let the unit cool and test again. Overheat protection may be tripping.

Intermittent shutdowns usually require inspection and replacement of door switches, latch components, or thermal cut-outs by a technician.

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Repair Difficulty

Hard 4/5

Required Part

Door Switch Assembly
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