Microwave shows E11 and stops heating; grill or convection functions may still work on combo models.
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.
Possible Causes
How to Fix / Troubleshooting
Safety warning: Magnetron and associated wiring carry high voltage. Do not attempt internal repairs without proper training.
User-level checks:
- 1. Confirm heating failure: Test with a cup of water on microwave-only mode. If water does not heat and E11 appears, the magnetron circuit is suspect.
- 2. Check other modes: On grill/convection models, test grill-only or convection-only. If those work but microwave mode fails, the magnetron or its drive circuit is at fault.
- 3. Power reset: Unplug for 10 minutes, then retry. If E11 returns, internal diagnosis is required.
Technician actions: Inspect magnetron terminals for overheating, test continuity, verify wiring to the high-voltage transformer or inverter, and check the current sense resistor or sensor on the control PCB.
Recommendation: Arrange service to replace the magnetron or control PCB as needed with Toshiba-approved parts.