Microwave displays H2 and will not start, often after extended cooking.

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.

Possible Causes

Failed magnetron thermostat, Blocked airflow, Defective cooling fan, Magnetron overheating due to internal failure

Safety: Unplug the unit and allow it to cool. Internal high-voltage (HV) components are dangerous.

Steps:

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

Professional Required 5/5

Magnetron Thermostat or Magnetron

Check Price on Amazon

We may earn a commission from links on this page.