The F05 error on your Indesit Oven means the appliance’s electronic control board has detected a fault with the temperature sensor (probe) circuit, usually caused by a wiring issue or a failing sensor. In many cases this can be checked and fixed without calling an engineer, though a multimeter helps confirm the problem.

Error code F05
Meaning Temperature sensor (probe) circuit fault detected by the oven’s control board
Severity Medium — the oven may still heat but temperature control becomes unreliable
Time to fix 20–45 minutes
Tools needed Multimeter, screwdriver

What the F05 error means

Indesit ovens use a temperature sensor to monitor internal heat and relay this information to the control board, which adjusts the heating elements accordingly. When the F05 code appears, the board has either lost communication with the sensor or received readings outside the expected range. This is similar in concept to sensor faults seen on washing machines, such as the Indesit Washing F05 Error Code: Causes and Fixes, where a probe or wiring issue disrupts normal operation.

Common causes

  • Faulty or degraded temperature sensor (probe)
  • Loose or corroded wiring connector at the sensor
  • Damaged wiring harness between sensor and control board
  • Control board malfunction or software glitch
  • Moisture or grease build-up affecting sensor contacts
  • Sensor knocked out of position during cleaning

How to fix the F05 error

  1. Power down and reset: Turn off the oven at the wall for 5 minutes, then switch back on. This clears temporary faults and may resolve the code immediately.
  2. Inspect the sensor location: Open the oven and locate the temperature probe, usually at the back or top interior wall. Check it isn’t touching the oven walls or dislodged.
  3. Check wiring connections: Once unplugged and cooled, access the rear panel to inspect the sensor’s wiring connector for looseness, corrosion, or damage.
  4. Test the sensor with a multimeter: Measure resistance across the sensor terminals. Compare readings to your model’s manual specifications; a reading far outside range confirms a faulty sensor.
  5. Replace the sensor if faulty: If testing confirms failure, order a compatible replacement sensor for your model and fit it following the wiring diagram in the manual.
  6. Call an engineer if the fault persists: If the sensor tests fine and wiring looks intact, the control board itself may need replacing — this requires professional diagnosis.

FAQ

Can I keep using my oven if it shows F05?
It’s not recommended, as the oven may overheat or undercook food due to inaccurate temperature readings. Switch it off and investigate before further use.

Is the F05 error the same on Indesit washing machines?
No, though the code number is shared, the fault relates to different components. For washing machine issues, see the Indesit Washing F05 Error Code: Causes and Fixes guide.

How much does it cost to replace an oven temperature sensor?
Replacement sensors typically cost £15–£40, plus labour if you hire an engineer, though many homeowners fit them themselves in under an hour.