Microwave shows E12; grill or convection functions (if equipped) may not operate.

Safety: Unplug the microwave and allow it to cool completely before inspection. Heating elements and surrounding metal can remain hot.

User-level steps (for combo microwave-grill/convection models):

• 1. Allow cooling: If E12 appeared during grill or convection use, let the unit cool for at least 30 minutes unplugged.
• 2. Clean around heater: Wipe away grease and food splatter from around the grill element and convection fan cover (if accessible from inside).
• 3. Ensure ventilation: Confirm that external vents are not blocked and that the unit has proper clearance.
• 4. Test basic microwave mode: After cooling, plug in and test standard microwave heating. If microwave mode works but grill/convection fails with E12, the heater circuit is likely faulty.

Technician-level checks:

• Test the grill heating element and convection heater for continuity.
• Inspect the heater thermal cut-out and wiring.
• Replace the defective heater element or thermal cut-out as needed.

Because heater circuits run at mains voltage and high temperatures, repairs should be done by a professional.