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Error code reference

Whirlpool Cooktop Error Code F-42 E-00

Power supply error from the power control board (Type 2 failure).

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Power supply error from the power control board (Type 2 failure).

First step from the service manual

Check for 240 volts AC at the main incoming power supply connection.

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

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What F-42 E-00 means on a Whirlpool cooktop

The F-42 E-00 error code on a Whirlpool cooktop indicates a power supply error originating from the power control board, classified specifically as a Type 2 failure. The power control board is responsible for receiving, regulating, and distributing the incoming 240 volts AC to the cooktop's heating elements and internal electronics. When the board detects an anomaly in the power supply it is receiving or processing, it triggers this fault code to alert the user and prevent potential damage to components.

A Type 2 failure classification points to a problem the control board has identified within its own power input or distribution circuitry. This can result from inadequate or unstable voltage arriving at the unit, a wiring fault between the power supply connection and the board, or internal board component failure. Because the cooktop requires a stable 240-volt AC supply split across two legs of approximately 120 volts each, a dropped leg, loose terminal connection, or tripped breaker can produce exactly this fault.

The first diagnostic step is to confirm that full 240 volts AC is present at the main incoming power supply connection of the cooktop. If the voltage reading is correct and stable, the issue is more likely internal to the power control board itself. If voltage is low, absent, or unstable, the problem lies upstream in the household wiring, the terminal block connection, or the circuit breaker panel.

Source: manufacturer service documentation.

Common causes of F-42 E-00

  1. 01

    Insufficient or unstable 240V supply voltage

    Wiring / connection

    A tripped breaker, a dropped leg in the circuit, or a loose connection at the wall outlet or junction box can prevent the cooktop from receiving the full 240 volts AC it requires. Measuring voltage at the main incoming power connection will confirm or rule this out.

  2. 02

    Loose or corroded terminal block connections

    Wiring / connection

    The wiring connections at the cooktop's power supply terminal block can loosen over time or corrode, causing intermittent or reduced voltage delivery to the control board. Inspect the terminal block for discoloration, arcing marks, or loose wire terminals.

  3. 03

    Faulty power control board

    Part replacement

    If the incoming 240-volt supply checks out correctly, the power control board itself may have failed internally, as the error is classified as a board-level Type 2 power fault. Visual inspection may reveal burned components, but board failure often requires replacement to resolve.

  4. 04

    Damaged or degraded power supply wiring

    Part replacement

    Wiring between the household connection and the power control board can become damaged from heat exposure or physical wear, causing resistance or intermittent open circuits. Inspect the wiring harness and supply leads for melting, fraying, or burn marks.

  5. 05

    Tripped or weak circuit breaker

    Wiring / connection

    A circuit breaker that has partially tripped or is beginning to fail can deliver reduced voltage to one leg of the 240-volt circuit, triggering the power supply fault. Resetting the breaker or testing it under load can help identify this condition.

See the test procedure for each cause

Frequently asked questions about F-42 E-00

What does F-42 E-00 mean on a Whirlpool cooktop?
F-42 E-00 is a power supply error code indicating a Type 2 failure detected by the power control board. The board has identified a problem with the power it is receiving or distributing internally. This causes the cooktop to stop operating until the fault is diagnosed and corrected. The first step is to verify that the unit is receiving a proper 240 volts AC at the main incoming power connection.
Can I fix F-42 E-00 myself or do I need a technician?
Some causes of this error, such as a tripped circuit breaker or a loose connection at the terminal block, can be addressed by a knowledgeable homeowner comfortable working around electrical systems. However, verifying voltage at the power supply connection and inspecting internal wiring and control board components involves working with 240-volt circuits, which carries serious safety risks. If you are not experienced with high-voltage appliance repair, having a qualified technician perform the diagnosis is strongly recommended.
Is it safe to use my Whirlpool cooktop when F-42 E-00 is displayed?
No, you should not attempt to use the cooktop while this error code is active. The fault indicates a power supply problem that the control board has flagged as a reason to shut down operation. Continuing to use the appliance before the issue is resolved could risk damage to the control board, wiring, or other components, and may present an electrical hazard.
Will resetting the cooktop clear the F-42 E-00 error?
Resetting the cooktop by turning off the circuit breaker for one to two minutes and restoring power may temporarily clear the code if the fault was caused by a transient power fluctuation. However, if an underlying issue exists, such as a failing control board, damaged wiring, or a weak circuit breaker, the error will return. A reset alone is not a repair and should be followed by proper diagnosis.
How much does it cost to repair a Whirlpool cooktop showing F-42 E-00?
Repair costs depend heavily on the root cause. If the issue is simply a tripped breaker or a loose terminal connection, there may be little to no parts cost involved, though a service call fee typically applies. If the power control board requires replacement, parts and labor combined can range from around $150 to $400 or more depending on the specific model and local labor rates. Getting a diagnostic estimate from a technician before committing to the repair is advisable.

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