H2
Midea
Magnetron Overheat Protection
Microwave shows H2 and will not start; may appear immediately after pressing START.
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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 cooling airflow around magnetron, Defective cooling fan motor, Magnetron running at excessive current
How to Fix / Troubleshooting
Safety warning: Unplug the microwave. Magnetron and high-voltage components are dangerous; internal checks should be done by trained personnel.
User-level checks:
- 1. Let unit cool: Wait at least 30 minutes with the door open, then plug back in and test. If H2 returns immediately, a thermostat or sensor is likely faulty.
- 2. Check vents and filters: Clean all vents and any removable grease filters (for over-the-range models) according to the manual.
- 3. Listen for fan: Ensure the cooling fan runs when you start a cook cycle.
Technician-level checks (summary):
- Test magnetron thermostat for continuity at room temperature.
- Inspect cooling fan operation and airflow channels.
- Check magnetron current draw and condition.
- Replace faulty thermostat, fan motor, or magnetron with OEM Midea parts.
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Repair Difficulty
Professional Required
5/5
Required Part
Magnetron Thermostat / Cooling Fan Motor for Midea Microwave
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