Cooker
F06
The F06 error code on a Leisure cooker indicates a fault with the oven’s temperature sensor (NTC probe), meaning the appliance cannot accurately read or regulate the oven temperature. It’s a moderately serious fault — your oven will likely stop heating or refuse to start until it’s resolved.
What does this error mean?
F06 signals that the oven control board has detected an open circuit or out-of-range reading from the NTC temperature sensor inside the oven cavity. The NTC (Negative Temperature Coefficient) probe is a small resistor-based sensor that tells the control board how hot the oven is. When that signal is missing or incorrect, the board shuts the oven down as a safety measure to prevent overheating.
Est. repair cost
£10–£30 DIY sensor replacement; £80–£180 professional repair (sensor or wiring); £150–£250+ if PCB replacement is required
🔍 Likely causes
🛠️ Step-by-step fix
Power off and reset: Switch the cooker off at the wall socket, leave it unpowered for 5 minutes, then switch back on. Clear any stored error codes by following the reset procedure in your Leisure cooker manual (usually hold the clock button for 5 seconds). If the oven works normally, a power surge was likely the cause.
Check for visible spillage on the sensor: With the oven completely cool and unplugged, locate the NTC probe — a thin metal pin, usually mounted on the back wall or roof of the oven cavity. If it’s coated in grease or burnt-on food, clean it gently with a damp cloth. Do not use abrasive cleaners.
Inspect the sensor wiring: Still with the appliance unplugged, carefully pull the oven away from the wall (if freestanding) and check the wiring loom at the back for any visibly burnt, frayed, or disconnected wires. Do not attempt to repair burnt wiring yourself — this requires a qualified electrician or appliance engineer.
Test the NTC sensor resistance: If you own a multimeter, disconnect the sensor connector and measure resistance across the two sensor terminals. At room temperature (around 20°C), a healthy NTC sensor typically reads approximately 10,000 ohms (10kΩ). A reading of infinite resistance (OL) confirms an open-circuit failure — the sensor needs replacing.
Replace the NTC temperature sensor: Leisure NTC oven sensors are widely available from UK spare parts suppliers (e.g., 4ourhouse, eSpares, BuySpares) for £10–£30. The sensor is usually held in place by one or two screws and a push-fit wiring connector — a straightforward DIY job if the wiring is undamaged. Always ensure the appliance is unplugged before replacing any parts.
If replacing the sensor does not clear the fault, the control board (PCB) may be at fault. PCB diagnosis and replacement should be carried out by a qualified appliance engineer, as incorrect fitting can cause further damage.
📞 When to call a professional
Call a qualified appliance engineer if the wiring loom is visibly burnt or damaged, if a new NTC sensor doesn’t clear the F06 code, or if you’re not comfortable working with electrical components. When you call, tell the engineer you have a Leisure cooker showing a persistent F06 error and that you’ve already ruled out a sensor fault — this will help them diagnose a potential PCB issue more quickly.
⚖️ Repair or replace?
A professional repair for an F06 fault — covering a call-out, sensor replacement, or PCB diagnosis — typically costs £80–£180 in the UK. If your Leisure cooker is under 5 years old, repair is almost always the right call. If it’s over 8–10 years old and the PCB has failed (the more expensive fix at £120–£200+ including parts), consider whether a replacement cooker at £300–£600 makes more financial sense long-term.