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Error code reference

Fisher & Paykel Cooktop Error Code F4

Ignition fault / No flame fault

Fisher & Paykel codesFisher & Paykel cooktop codes

Ignition fault / No flame fault - Flame detection has failed three times (2 re-lights) within 40 seconds; either the burner is not igniting or flame detection is not working.

First step from the service manual

Check hot surface igniter and flame detection circuit.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F4 means on a Fisher & Paykel cooktop

The F4 error code on a Fisher & Paykel cooktop indicates an ignition fault or no-flame fault. Specifically, the control system has attempted to light the burner three times within a 40-second window, including two re-light attempts, and has not successfully detected a stable flame. This means the cooktop's electronics have exhausted their automatic retry sequence and are flagging a persistent failure in either the ignition process or the flame detection circuit.

The ignition and flame detection system works by generating a spark to ignite the gas and then using a flame sensor to confirm combustion. If the sensor does not register a flame signal after repeated spark attempts, the control board interprets this as a safety-critical failure and triggers F4. The fault can originate from two distinct sides of the system: the burner itself failing to ignite (due to blocked ports, moisture, a faulty igniter, or a gas supply issue), or the flame detection circuit failing to recognize a flame that is actually present (due to a fouled or cracked sensor, a wiring fault, or a failed control board).

Diagnosis should start with a physical inspection of the hot surface igniter and the flame sensor electrode for carbon buildup, cracking, or moisture. Check that burner ports are clear and that gas pressure is adequate. Then move to the detection circuit, inspecting wiring continuity between the flame sensor and the control board. If the igniter sparks visibly but the error persists, the flame detection circuit or control board is the likely culprit.

Source: manufacturer service documentation.

Common causes of F4

  1. 01

    Dirty or blocked burner ports

    Wiring / connection

    Food debris, grease, or spill residue clogging the burner ports can prevent gas from flowing evenly, making ignition unreliable. Inspect and clean the burner cap and ports thoroughly.

  2. 02

    Fouled or damaged flame sensor electrode

    Wiring / connection

    Carbon buildup or a crack in the flame sensor electrode prevents it from accurately detecting combustion, causing the control board to register no flame even when the burner is lit. Clean the electrode carefully or inspect it for visible damage.

  3. 03

    Faulty or wet hot surface igniter

    Part replacement

    Moisture from spills or a worn igniter can prevent a consistent spark from being generated. Check whether the igniter is sparking visibly during an ignition attempt and allow the cooktop to dry completely if recently exposed to liquid.

  4. 04

    Wiring fault in the flame detection circuit

    Wiring / connection

    A broken, corroded, or disconnected wire between the flame sensor and the control board can interrupt the detection signal. Inspect all wiring connections along the ignition and flame detection circuit for continuity.

  5. 05

    Failed control board

    Part replacement

    If the igniter sparks correctly and the flame sensor and wiring check out, the control board itself may have failed and is unable to process the flame detection signal. This typically requires board replacement.

See the test procedure for each cause

Frequently asked questions about F4

What does F4 mean on a Fisher & Paykel cooktop?
F4 indicates an ignition fault or no-flame fault. The cooktop attempted to light the burner three times within 40 seconds, including two automatic re-light attempts, and either failed to ignite or failed to detect a flame each time. The cooktop stops trying and displays F4 as a safety measure. The issue can lie with the burner, the igniter, the flame sensor, or the detection circuit wiring.
Can I fix the F4 error myself on a Fisher & Paykel cooktop?
Some causes of the F4 error are DIY-friendly. Cleaning clogged burner ports, drying out a wet igniter, or wiping down a dirty flame sensor electrode are tasks most homeowners can handle safely. If those steps do not resolve the fault, diagnosing wiring continuity or replacing a control board is best left to a qualified appliance technician.
Will resetting the cooktop clear the F4 error?
Resetting the cooktop by turning off power at the circuit breaker for a few minutes may temporarily clear the F4 code, but the error will return if the underlying cause is not corrected. A reset is useful for confirming whether the fault is intermittent, such as one caused by moisture, but it is not a permanent fix for mechanical or electrical failures.
Is it safe to use my Fisher & Paykel cooktop while it shows F4?
No, you should not continue using the cooktop while F4 is active. The error means the burner either did not ignite or the flame detection system cannot confirm combustion, which represents a gas safety risk. Stop attempting to use the affected burner and address the fault before resuming cooking.
How much does it cost to repair a Fisher & Paykel cooktop showing F4?
Repair costs vary depending on the root cause. Cleaning the burner and sensor costs little to nothing if done yourself. A replacement igniter or flame sensor part typically runs in the range of $30 to $100 for parts alone. If the control board has failed, parts and labor combined can range from $150 to $400 or more depending on the model and your location.

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