mypros+
Error code reference

Whirlpool Cooktop Error Code F1E1

Inverter checks failure

Whirlpool codesWhirlpool cooktop codes

Inverter checks failure — possible causes include FPWM output test failed, blue button failure, NTC stuck, coil NTC short, IGBT NTC short/open, PWM gate driver fault, main relay stuck open, or PWM output short test failed.

First step from the service manual

Verify if F1E1 occurs after the first cycle (can occur on initial use after power reset due to algorithm); if it recurs after initial cycle it is a legitimate error — check coil NTC for short circuit, replace coil if bad or replace IPC if NTC is OK.

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

MyPros+ Max

Get the full diagnostic procedure for F1E1.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F1E1 means on a Whirlpool cooktop

The F1E1 error code on a Whirlpool induction cooktop indicates a failure detected during the inverter self-check routine. The inverter system is responsible for converting DC power into the high-frequency AC current that drives the induction coils. During startup or between cooking cycles, the control system runs a series of diagnostic checks on the inverter circuit. If any of these checks fail, F1E1 is triggered and the cooktop halts operation to prevent component damage.

The specific failures this code can represent cover a wide range of inverter subsystems. These include a failed FPWM output test, a faulty blue button input, an NTC temperature sensor that is stuck or reading incorrectly, a shorted coil NTC or IGBT NTC, an open IGBT NTC, a PWM gate driver fault, a main relay stuck in the open position, or a short detected during the PWM output test. The NTC sensors monitor temperatures at the coil and the IGBT switching transistors, and any short or open condition in those circuits will register as an inverter check failure.

An important diagnostic detail is that F1E1 can appear once after a power reset without indicating a true hardware fault. The inverter algorithm on the first post-reset cycle may trip this code as part of normal initialization. If the code clears after that first cycle and does not return, no repair is needed. If it recurs on subsequent cycles, the most direct diagnostic path is to check the coil NTC for a short circuit. A shorted coil NTC points to a failed coil assembly, while a coil NTC that tests good shifts suspicion to the IPC (inverter power control board).

Source: manufacturer service documentation.

Common causes of F1E1

  1. 01

    Coil NTC sensor short circuit

    Part replacement

    The NTC temperature sensor embedded in the induction coil assembly can develop a short, which directly triggers the F1E1 inverter check failure. Testing the coil NTC for a short circuit is the first recommended hardware check after confirming the code is not a one-time initialization artifact.

  2. 02

    Failed IPC (inverter power control board)

    Part replacement

    If the coil NTC tests normal with no short present, the inverter power control board itself is the likely source of the failure. The IPC manages PWM output, gate drivers, and relay control, all of which are checked during the inverter self-test.

  3. 03

    IGBT NTC sensor fault (short or open)

    Part replacement

    The NTC sensor monitoring the IGBT switching transistors can fail in either a shorted or open condition, both of which cause the inverter check to fail. This sensor is part of the inverter board circuit and is evaluated separately from the coil NTC.

  4. 04

    Main relay stuck open

    Part replacement

    If the main relay on the inverter circuit is stuck in the open position, the inverter self-check will detect the fault and generate F1E1. The relay failure prevents power from reaching the coil circuit during the PWM output test.

  5. 05

    One-time initialization false trigger

    Wiring / connection

    On the first power cycle after a reset, the inverter algorithm can generate F1E1 as part of its startup sequence without any actual hardware fault present. If the code does not reappear after the first cycle, no component replacement is needed.

See the test procedure for each cause

Frequently asked questions about F1E1

What does F1E1 mean on a Whirlpool cooktop?
F1E1 indicates that the cooktop's inverter self-check routine has detected a failure. The inverter system controls the power delivery to the induction coils, and the diagnostic check covers components including NTC temperature sensors, IGBT transistors, PWM gate drivers, and the main relay. The cooktop disables itself when this check fails to prevent further damage. A technician will need to identify which specific part of the inverter circuit has failed.
Will resetting the power clear the F1E1 error on my Whirlpool cooktop?
A power reset may temporarily clear F1E1, and in some cases the code can appear once after a reset as part of normal inverter initialization without indicating a real fault. However, if the code returns on the next use cycle, the reset has not resolved the underlying issue and further diagnosis is required. Repeated recurrence of F1E1 after the first cycle means a component has genuinely failed.
Is it safe to use my Whirlpool cooktop when F1E1 is displayed?
The cooktop will typically disable cooking functions when F1E1 is active, which prevents use while the fault is present. This shutdown is a protective measure for the inverter components. Do not attempt to bypass the error or force operation. The cooktop should remain off until the fault is diagnosed and the faulty component is repaired or replaced.
How do I fix the F1E1 error on a Whirlpool induction cooktop?
Start by confirming whether the code reappears after the first full power cycle following a reset, since a single occurrence can be a normal initialization behavior. If the code recurs, test the coil NTC sensor for a short circuit. A shorted coil NTC requires replacement of the coil assembly. If the coil NTC tests normal, the inverter power control board is the next component to replace.
How much does it cost to repair a Whirlpool cooktop showing F1E1?
Repair costs vary depending on which component has failed. A replacement induction coil assembly typically ranges from $80 to $200 or more for the part alone, while an inverter power control board can range from $100 to $300 or higher depending on the model. Adding professional labor generally brings total repair costs to somewhere between $150 and $500. Getting a diagnostic estimate before committing to a repair is recommended, since part costs vary significantly by model.

Related Whirlpool cooktop codes

All Whirlpool cooktop codes
View all 76 Whirlpool cooktop codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass