H1
Galanz Cavity Overheat Protection

Microwave displays H1 or HI and stops; often associated with over-temperature condition.

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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

Blocked vents, Failed cooling fan, Overuse on high power without load, Faulty overheat thermostat

How to Fix / Troubleshooting

Safety: Unplug the microwave and allow it to cool completely before further use.

Steps:

  • 1. Let it cool: Leave the door open for 30–60 minutes to allow internal temperatures to drop.
  • 2. Check ventilation: Ensure the microwave has the recommended clearance and that vents are not blocked by cabinets or objects.
  • 3. Clean filters and vents: On over-the-range models, remove and clean grease filters. Vacuum dust from intake and exhaust vents.
  • 4. Test cooling fan: If H1 recurs, a technician should check the internal cooling fan motor and overheat thermostat for proper operation and replace as needed.
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Repair Difficulty

Medium 3/5

Required Part

Cooling Fan Motor or Overheat Thermostat
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