Error Code
high
Unox BAKERLUX SHOP.Pro – Contactors are Chattering
On your BAKERLUX SHOP.Pro unit, chattering contactors typically indicate an unstable power…
Unox BAKERLUX SHOP.Pro - Error AF03: Temperature Probe Damaged Alarm
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 BAKERLUX SHOP.Pro unit, error code AF03 indicates a damaged or disconnected temperature probe, which is crucial for accurate oven operation. This issue can lead to improper heating or complete shutdown. Begin by verifying the probe's connection and testing its resistance before considering replacement or a power board swap.
Technical Details
Repair Steps:
- Safety First: Power Down and Cool. Immediately turn off the oven’s main power supply and allow it to cool completely before proceeding with any inspection or repair. Failure to do so can result in electrical shock or burns.
- Access Oven Internals. Carefully remove the rear access panel of your UNOX BAKERLUX SHOP.Pro oven to gain access to the internal components, specifically locating the temperature probe and its connection to the power board.
- Inspect Temperature Probe Connection (P14). Locate the temperature probe cable and verify that it is securely plugged into the P14 socket on the main power board. If the connection appears loose or corroded, firmly re-seat it. After re-seating, power on the oven and test if the AF03 alarm has cleared.
- Test Temperature Probe Resistance. If the connection is secure or re-seating did not resolve the issue, disconnect the temperature probe completely from the P14 socket. Using a digital multimeter set to ohms (Ω), measure the resistance across the probe’s terminals. At an ambient temperature of 25°C (77°F), a healthy probe should register approximately 110Ω.
- Replace Temperature Probe. If the multimeter reading deviates significantly from the expected 110Ω at 25°C, the temperature probe is faulty and requires replacement. Obtain a genuine UNOX replacement probe for your BAKERLUX SHOP.Pro model and install it, ensuring correct polarity and secure connection.
- Consider Power Board Replacement. If the temperature probe tests correctly (approx. 110Ω at 25°C) and is securely connected, but the AF03 alarm persists, the fault may lie with the main power board. This indicates an internal circuit issue preventing proper temperature signal interpretation, necessitating power board replacement.
- Final Test and Reassembly. After replacing either the probe or the power board, carefully reassemble the oven’s rear panel. Restore power to the unit and run a test cycle to confirm that the AF03 alarm is cleared and the oven operates normally, maintaining desired temperatures.
Common Questions:
Q: What does error code AF03 specifically indicate on my UNOX BAKERLUX SHOP.Pro?
A: Error code AF03/A03 on a UNOX BAKERLUX SHOP.Pro oven signifies a damaged or improperly connected temperature probe. This probe is critical for accurate temperature sensing and control during cooking, and its malfunction will impair oven operation.
Q: How do I correctly test the temperature probe’s resistance with a multimeter?
A: To test the probe, first power off the oven and disconnect the probe from the P14 socket. Use a multimeter set to ohms, measuring across the probe’s terminals. At an ambient temperature of 25°C (77°F), the probe should ideally show a resistance reading of approximately 110Ω. Significant deviation indicates a faulty probe.
Q: If I’ve replaced the temperature probe but the AF03 alarm still appears, what should I do next?
A: If a new, correctly installed temperature probe does not resolve the AF03 alarm, the issue likely stems from the main power board. This board may have an internal fault preventing it from correctly interpreting the probe’s signal, and its replacement would be the next recommended step.
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.