Unox WF23

What does Unox WF23 mean?

WF23 is a blower tachometer warning. The tachometer that measures the blower (fan) speed is not returning a valid signal, so the oven cannot confirm the blower is running at the correct speed. It warns the user while air circulation monitoring is impaired.

Symptoms

• WF23 warning on the control panel
• Blower speed cannot be confirmed by the control
• Possible uneven air circulation
• Warning recurs during operation

Common causes

• Faulty blower tachometer / speed sensor
• Wiring fault on the tachometer signal
• Connector fault at the sensor or board
• Blower motor speed irregular

Diagnostic steps

1. 01

   Power down and check the sensor

   Turn off power and inspect the blower tachometer and its connections.

2. 02

   Reseat the connector

   Reconnect the tachometer signal connector at the sensor and the board.

3. 03

   Test the signal wiring

   Check continuity of the tachometer wiring with a multimeter.

4. 04

   Replace the sensor

   Replace the tachometer if it does not provide a valid speed signal and retest.

When to call a professional

WF23 concerns the fan speed feedback. Testing and replacing the tachometer requires opening the oven and accessing the blower assembly, which a qualified Unox technician should handle if reseating the connector does not resolve the warning.