Error Code
high
Unox OVEN – Control Panel or USB Board Defective – Buzzer Does Not Sound
On your CHEFTOP and BAKERTOP MIND.Maps™ unit, a non-sounding buzzer often indicates…
Unox OVEN - Error WF38: Flame Control Board Warning
Critical / Stop Operation
Warning: The information provided here is for educational purposes only.
Working with commercial kitchen equipment involves high voltage, gas, and high temperatures.
We strongly recommend contacting a certified service technician for any repairs.
We are not responsible for any damage or injuries resulting from DIY repair attempts.
This information is provided 'as is' without any guarantees of completeness or accuracy.
TLDR
On your CHEFTOP and BAKERTOP MIND.Maps™ unit, error code WF38 indicates a warning from the flame control board, signaling an issue within the gas combustion system. This typically points to problems with the flame sensor, gas supply, igniter, or the control board itself. Prompt diagnosis and repair are crucial to restore safe and reliable oven operation.
Technical Details
Repair Steps:
- Safety First: Immediately shut off the gas supply to the oven and disconnect the electrical power. Allow the unit to cool down completely before proceeding with any inspection.
- Check Gas Supply: Verify that the main gas supply valve to the oven is fully open and that there is sufficient gas pressure. Inspect the gas line for any kinks, blockages, or leaks.
- Inspect Flame Sensor/Ionisation Probe: Locate the flame sensor (often an ionisation probe or electrode) in the combustion chamber. Carefully clean any carbon buildup or debris from its tip using fine-grit sandpaper or a wire brush. Check for any cracks or damage to the ceramic insulator or the wiring connection.
- Examine the Igniter: Confirm that the igniter is working correctly. When the oven attempts to ignite, you should hear or see a spark. Check its condition for cracks, wear, or proper positioning near the gas burner.
- Verify Wiring and Connections: Trace all wiring associated with the flame control board, flame sensor, and igniter. Look for loose connections, frayed wires, or signs of heat damage. Ensure all connectors are securely seated.
- Inspect Flame Control Board: Visually examine the flame control board for any obvious signs of damage such as burnt components, bulging capacitors, or scorch marks. While visual inspection isn’t conclusive, it can sometimes reveal clear faults.
- Reset the Oven: After checking and addressing any issues, restore power and gas. Attempt to reset the oven by turning it off and then on again, or by performing a full power cycle at the main breaker.
- Professional Assistance: If the WF38 error persists after performing these checks, the flame control board itself may be faulty, or there could be a more complex issue with the gas train components. Contact a qualified Unox service technician for further diagnosis and repair.
Common Questions:
Q: What does Unox error code WF38 signify?
A: Unox error code WF38 signifies a warning issued by the flame control board, indicating a detected anomaly or issue within the oven’s gas combustion system.
Q: Is it safe to operate my Unox oven with a WF38 error?
A: No, it is generally not safe to operate an oven displaying a WF38 error. Issues with the flame control board directly impact gas combustion and can pose safety risks, including incomplete combustion or gas leaks. Shut down the unit and seek professional service.
Q: What components are typically involved in a WF38 flame control board warning?
A: The WF38 warning usually points to problems with the flame sensor (ionisation probe), the gas valve, the igniter, wiring connections, or the flame control board itself, all crucial for safe gas ignition and monitoring.
When to call a technician
For this error, we recommend calling a certified technician. Do not continue operation or attempt repair yourself.
- Equipment shows a critical or stop-operation fault.
- You smell gas, burning, or see smoke or sparks.
- Error returns after following the steps above.
- You are not trained to work on this equipment.
- Warranty or safety could be affected by DIY repair.