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Error code reference

Maytag Oven Error Code F-42

Induction cooktop power supply issue (Type 2 failure).

Maytag codesMaytag oven codes

Induction cooktop power supply issue (Type 2 failure).

First step from the service manual

Check for 240 VAC at the main incoming power supply connection; verify voltage at J1 L-N and J2 L-N at EMI filter board and J1 L-N at both IPCs.

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

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What F-42 means on a Maytag oven

The F-42 error code on a Maytag induction oven indicates a Type 2 power supply failure within the induction cooktop system. This fault is specifically tied to the power delivery chain that feeds the induction power control (IPC) boards, which are responsible for generating the high-frequency current used to heat induction cooking zones. A Type 2 classification distinguishes this failure from other induction power faults, pointing to issues in the incoming AC supply or its distribution through the electrical filter components rather than the induction coils themselves.

The diagnostic process centers on verifying 240 VAC at the main incoming power supply connection, followed by checking voltage at specific test points on the EMI filter board (J1 L-N and J2 L-N) and at J1 L-N on each IPC board. The EMI (electromagnetic interference) filter board conditions incoming power before it reaches the IPC boards, and a failure at any point in this chain can trigger the F-42 code. If voltage is present at the main supply but drops or disappears at the EMI filter or IPC input connectors, the fault is isolated to the filter board or the wiring between components.

Common root causes include low or unbalanced supply voltage from the home electrical panel, a failed EMI filter board, damaged wiring or connector terminals between the main supply and the IPCs, or a failed IPC board itself. Because 240 VAC is present at multiple test points in this diagnostic sequence, this work must be performed with proper safety precautions and appropriate metering equipment.

Source: manufacturer service documentation.

Common causes of F-42

  1. 01

    Inadequate or unbalanced 240 VAC supply

    Wiring / connection

    If the home circuit supplying the oven is delivering low or unbalanced voltage, the induction system will fault. Check the circuit breaker and verify true 240 VAC is present at the wall outlet or junction box.

  2. 02

    Failed EMI filter board

    Part replacement

    The EMI filter board conditions incoming power before distributing it to the IPC boards. A failed filter board will show correct voltage at the main supply but missing or incorrect voltage at its J1 L-N or J2 L-N output connectors.

  3. 03

    Damaged wiring or connector terminals

    Wiring / connection

    Loose, burned, or corroded connectors between the main supply, EMI filter board, and IPC boards can interrupt voltage delivery and trigger F-42. Inspect each connector and terminal for heat damage or corrosion.

  4. 04

    Failed IPC board

    Part replacement

    If voltage is confirmed at the EMI filter output but is absent at J1 L-N on an IPC board, the IPC board itself may have an internal short or open circuit causing the power supply fault.

  5. 05

    Tripped or weak circuit breaker

    Wiring / connection

    A breaker that has partially tripped or is failing can deliver reduced voltage to the oven without fully opening, causing intermittent or sustained F-42 faults. Reset or replace the breaker if it does not hold a full 240 VAC load.

See the test procedure for each cause

Frequently asked questions about F-42

What does F-42 mean on a Maytag oven?
F-42 indicates a Type 2 induction cooktop power supply failure. The control has detected that the induction system is not receiving proper voltage at one or more points in its power delivery chain, which includes the main supply connection, the EMI filter board, and the IPC boards. The cooktop will not operate while this fault is active.
Can I fix the F-42 error myself?
Some steps, like checking the circuit breaker or verifying that the oven is receiving 240 VAC at the wall, are safe for a homeowner to perform. However, diagnosing voltage at internal components like the EMI filter board and IPC boards involves working with live 240 VAC circuits inside the appliance, which requires proper training and safety equipment. Internal component replacement should be handled by a qualified technician.
Is it safe to use my oven if it shows an F-42 error?
The induction cooktop will not function normally when F-42 is active, and attempting to operate it in this state is not recommended. Because this fault involves the high-voltage power supply to the induction system, continuing to use the appliance without diagnosis could risk further component damage. The oven bake and broil functions may still operate depending on the model, but the cooktop should not be relied upon until the fault is resolved.
Will resetting the oven clear the F-42 error?
Resetting the oven by cutting power at the breaker for a few minutes may temporarily clear the code, but if the underlying power supply issue is still present, the F-42 error will return. A reset is useful for ruling out a one-time glitch, but a recurring F-42 code requires voltage testing and component inspection to resolve permanently.
How much does it cost to repair an F-42 error on a Maytag oven?
Repair costs vary depending on the root cause. If the issue is a tripped breaker or loose connection, costs may be minimal. An EMI filter board replacement typically runs in the range of $80 to $200 for the part alone, while an IPC board can range from $150 to $400 or more depending on availability. Adding professional labor, total repair costs commonly fall between $150 and $600 depending on which components need replacement and your location.

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