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 - Temperature Probe Damaged or Power Board Defective - Does Not Cook Evenly
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, uneven cooking indicates either a damaged temperature probe or a defective power board. Begin by measuring the resistance of the temperature probe circuit. If the resistance value is incorrect, the probe requires replacement; otherwise, the power board is the likely culprit.
Technical Details
Repair Steps:
- Safety First: Before performing any inspection or repair, disconnect the UNOX CHEFTOP/BAKERTOP MIND.Maps™ oven from its main power supply. Allow the oven to cool completely.
- Access the Probe Circuit: Locate the temperature probe connection, typically found at the oven’s control board or within the oven cavity itself. Consult your UNOX service manual for precise location and wiring diagrams.
- Measure Probe Resistance: Set your multimeter to the ohm (Ω) range. Disconnect the temperature probe from the power board. Carefully measure the resistance across the two terminals of the temperature probe circuit.
- Check Reference Value: Verify if the measured resistance is approximately 110 Ω at 25 °C (77 °F). Note that probe resistance changes with temperature; ensure your environment is close to the reference temperature for accurate assessment, or refer to a probe resistance chart if available.
- Replace Temperature Probe: If the measured resistance deviates significantly from 110 Ω at 25 °C (77 °F), the temperature probe is faulty. Obtain a genuine UNOX replacement temperature probe part number and install it according to the manufacturer’s instructions. Ensure all connections are secure.
- Replace Power Board: If the temperature probe resistance measures correctly (around 110 Ω at 25 °C / 77 °F), then the issue likely lies with the power board itself. Disconnect all wiring, carefully remove the old power board, and install a new, genuine UNOX power board. Reconnect all wires ensuring proper orientation and secure fit.
- Test Operation: Reconnect the oven to the main power supply. Turn the unit on and run a test cooking cycle, monitoring for even temperature distribution and proper cooking.
- Verify Calibration: After component replacement, consider performing an oven calibration procedure if available in the service menu to ensure optimal performance.
Common Questions:
Q: Why is my UNOX oven cooking unevenly?
A: Uneven cooking in your UNOX CHEFTOP or BAKERTOP MIND.Maps™ unit often stems from a malfunctioning temperature probe providing inaccurate readings or a defective power board failing to regulate heating elements correctly. Both issues compromise precise temperature control.
Q: How can I prevent temperature probe failures?
A: While probes can fail over time, ensure your oven’s interior is kept clean from food debris that could accumulate around the probe. Also, avoid harsh impacts during cleaning or loading/unloading that could physically damage the probe’s sensor tip or cable.
Q: Can a defective power board cause other issues besides uneven cooking?
A: Absolutely. A defective power board can lead to a wide array of problems, including complete oven shutdown, intermittent functionality, incorrect display readings, failure of heating elements or fans, and communication errors with other oven components. It’s a critical component for overall operation.
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.