Range Medium Severity
F7 Appliance Error Code

Asko Range F7 Error: Surface heat sensor fault

Asko range F7 error is a common issue reported by Asko appliance owners. What Does Asko Range Error Code F7 Mean? F7 signals a fault with the surface or panel temperature sensor on the range. On a combined range this sensor monitors both the cooktop glass temperature (for the residual heat indicator) and ambient temperature […]

By Lucy Crawford Senior Appliance Technician & Content Reviewer

Yes

DIY Fixable

From $80

Typical Repair Cost

15-30 min

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Maybe. Treat every cooktop zone as potentially hot after use regardless of the "H" display until F7 is repaired. The oven section may remain functional — test each section individually. Always supervise children closely near the range while F7 is unresolved.

Can I reset the code?

Yes. A breaker reset may clear transient F7 faults caused by moisture. A physically failed sensor will cause the code to return. If the "H" warning is not functioning correctly, arrange repair as a safety priority.

When to stop immediately?

Stop if you notice: Treat the cooktop glass as always hot after cooking until F7 is resolved — do not rely on the "H" indicator., Stop using the range if any section (oven or cooktop zone) is locked out and producing no heat — cooking is not possible..

Symptoms You May Notice

Residual heat "H" indicator stays permanently on

The hot surface warning on one or more cooktop zones remains lit even after the range has been cold for several hours, indicating a false-hot reading from the surface sensor.

F7 displayed on range panel at startup

F7 appears as soon as the range is powered on before any zone or oven mode is selected, confirming the sensor is producing an invalid reading at room temperature.

"H" indicator never lights after cooking

In the inverse failure mode the hot surface warning does not activate after genuine high-temperature cooking — a safety hazard for household members who may touch the hot glass.

Cooktop zone or oven section locked out

The range disables the section associated with the failed sensor as a precaution, preventing cooking until the sensor circuit is restored.

Possible Causes

1

Failed NTC surface sensor

The thermistor measuring glass or panel temperature has failed open or short circuit, producing a value that the PCB rejects as implausible.

Requires Professional
2

Open-circuit sensor wiring

Thermal cycling has caused the thin sensor wires to fatigue and break, producing a permanent open-circuit condition and triggering F7.

Requires Professional
3

Liquid ingress at sensor

Boil-over liquid reaching the sensor through the glass edge seal or from below the cooktop surface causes sensor corrosion and erratic readings.

Requires Professional

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Full cool-down and breaker reset

    Ensure the range has been completely cold for at least 2 hours, then perform a 5-minute breaker reset. After power is restored, observe whether F7 appears immediately or only after a cooking session.

    An F7 that appears on a demonstrably cold range confirms a failed sensor rather than a genuine residual heat condition.

  2. 2

    Check for liquid spills

    Carefully inspect the cooktop surface edge seals and the area around the control panel for signs of liquid intrusion — water marks, staining under the glass, or rust-coloured residue at the seal edges.

    If liquid has visibly entered under the glass, allow the range to dry in a warm room for 24–48 hours before retesting. Persistent liquid in the sensor area will continue triggering F7.

  3. 3

    Test "H" indicator behaviour

    After a successful reset, cook briefly on one induction zone at medium power for 5 minutes, then switch it off. The "H" indicator for that zone should activate immediately and extinguish gradually as the glass cools. Abnormal "H" behaviour (never lights or never goes off) confirms a sensor fault on that zone.

    Compare the "H" behaviour across all zones to isolate whether the fault is on a single zone sensor or a system-wide sensor circuit.

When to Call a Professional

Contact a qualified technician if:

  • F7 persists after a full cool-down and breaker reset with no liquid ingress apparent.
  • The "H" hot surface warning never activates after confirmed high-temperature cooking — immediate safety risk.
  • Visible moisture, fogging, or liquid staining under the glass ceramic surface.

Need Professional Help?

Find qualified technicians in your area for proper diagnostics and repair.

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