H2
Galanz Magnetron Overheat Lockout

Microwave shows H2 and will not start; often after extended cooking.

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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 magnetron thermostat, Blocked airflow, Defective cooling fan, Magnetron running too hot due to internal failure

How to Fix / Troubleshooting

Safety: Unplug and allow the unit to cool. Internal HV components are dangerous.

Steps:

  • 1. Cooling period: Wait at least 30 minutes with the door open, then plug back in and test.
  • 2. Check airflow: Confirm that vents are clear and that the unit is not installed in a confined space without proper ventilation.
  • 3. Internal inspection: A technician should inspect the magnetron thermostat, cooling fan, and magnetron for overheating signs and replace faulty parts.
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Repair Difficulty

Professional Required 5/5

Required Part

Magnetron Thermostat or Magnetron
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