Unox WF02
Front / chamber temperature probe warning.
Source: Unox/Unox_XACC-0513-EPLM_ServiceManualAll_CommercialKitchen.pdf
What does Unox WF02 mean?
WF02 is the front (chamber) temperature probe warning, listed alongside WF01. It indicates a problem with a chamber temperature probe but as a warning rather than a blocking alarm, so the oven continues to operate with restricted functions while flagging that the probe reading is unreliable.
Symptoms
- WF02 warning shown on the control panel
- Oven continues to run with reduced functions
- Suspect or fluctuating chamber temperature reading
- Warning recurs after being cleared
Common causes
- Front chamber temperature probe out of range
- Loose or corroded probe connection
- Probe partial failure or drift
- Wiring fault to the board
Diagnostic steps
- 01
Clear and observe
Acknowledge the warning with OK and watch whether WF02 returns during cooking.
- 02
Inspect the probe connection
With power off, check the front chamber probe connector is secure at the board.
- 03
Measure the probe
Measure the probe resistance with a multimeter against the Unox probe table and compare with the other chamber probe.
- 04
Replace if faulty
Replace the front chamber temperature probe if it is out of specification.
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When to call a professional
WF02 is a warning but signals an unreliable temperature reading. For consistent cooking results and food safety, have a qualified Unox technician verify and replace the front chamber probe if clearing the warning does not resolve the issue.
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Open a ticket — free accountOther Unox error codes
Motor thermal protection alarm (permanent error) — the fan motor's thermal protection has tripped.
AF02Safety thermostat alarm — the chamber safety thermostat has tripped above its limit.
AF03Temperature probes alarm — a cooking chamber temperature probe is damaged or disconnected.
AF04Communication error with the power board — the control board lost communication with the power board.
AF23Gas alarm — a fault in the gas burner/ignition system (split into multiple AF23 conditions on later software).
AF24Wrong position of Pollo valve.
AF25Trolley is missing.
AF26Tank missing or safety thermostat fault.
AF39Chamber ceiling temperature too high.
AF41Chamber over-temperature condition (Case 1: T > 150 °C / 302 °F; Case 2: T < 150 °C).
AF43Single-point or multi-point core probe completely damaged.
WF01Chamber temperature probe warning.
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