Unox WF20

What does Unox WF20 mean?

WF20 is a warning related to rotor valve EG1, part of the oven's water/steam circuit. The oven has detected that valve EG1 is not operating as expected. As a warning it allows limited operation while flagging that this valve needs attention.

Symptoms

• WF20 warning on the control panel
• Steam or rotor function not working correctly
• Valve not actuating on command
• Warning recurs during the affected cycle

Common causes

• Rotor valve EG1 stuck or faulty
• Valve coil failure
• Wiring fault to EG1
• Blockage or scale in the valve

Diagnostic steps

1. 01

   Power down and locate EG1

   Turn off power and identify rotor valve EG1 in the water/steam circuit.

2. 02

   Check valve operation

   Verify EG1 actuates when energised and is not stuck or blocked by scale.

3. 03

   Test the coil and wiring

   Measure the valve coil and check its wiring with a multimeter.

4. 04

   Replace the valve

   Replace rotor valve EG1 if it does not operate correctly and retest.

When to call a professional

WF20 involves a specific solenoid valve in the steam circuit. Testing the coil, wiring and replacing the valve combines electrical and plumbing work best done by a qualified Unox technician if a basic check does not clear the warning.