E16

SMEG Cooling Fan Control Fault

Microwave displays E16; fan may run continuously even when idle.

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

Stuck cooling fan relay, Shorted triac driving fan, Faulty temperature sensor causing fan overrun, Control PCB logic error

How to Fix / Troubleshooting

Safety: Unplug the microwave before inspection.

User checks:

Allow the microwave to cool for at least 30 minutes, then plug back in and see if the fan stops after a short period.
Ensure vents are not blocked, which can cause prolonged fan operation.

Reset:

Perform a full power reset (unplug 10 minutes, then reconnect).

Technician checks:

Test the cooling fan motor for correct operation.
Inspect the control PCB fan relay or triac for welded contacts or shorts.
Verify temperature sensor readings to ensure the board is not falsely detecting overheat.

Persistent E16 usually requires control PCB or sensor replacement.

Repair Difficulty

Hard 4/5

Required Part

Cooling Fan Relay on Control PCB

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