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Error code reference

Maytag Microwave Error Code F5

HV/LV Board failure detected.

Maytag codesMaytag microwave codes

HV/LV Board failure detected.

First step from the service manual

Replace HV/LV Board.

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

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What F5 means on a Maytag microwave

The F5 error code on a Maytag microwave indicates a touch panel failure detected by the control board. The touch panel is the membrane switch assembly that registers button presses and sends signals to the control board. When the control board cannot read valid input signals from the touch panel, or detects a short or open circuit within the panel membrane, it throws F5 and locks out operation. This can occur spontaneously or after a power event.

For homeowners, the F5 code means the buttons on the front of your microwave have stopped communicating correctly with the microwave's brain. The touch panel is the flat surface with printed buttons that you press to set cook times and power levels. When this panel fails, the microwave cannot accept commands and will display F5 instead of operating normally. The panel itself is a sealed membrane layer that wears out over time, develops internal shorts, or loses contact with the ribbon cable that connects it to the control board.

In most cases, the touch panel must be replaced to clear this error. Occasionally the ribbon cable connecting the panel to the control board is the actual failure point, so inspecting that connection before ordering parts is worth doing. A full control board failure can also present as F5 if the board misreads panel signals, though this is less common.

Source: manufacturer service documentation.

Common causes of F5

  1. 01

    Failed touch panel membrane

    Part replacement

    The membrane switch layer inside the touch panel develops internal shorts or open circuits over time from repeated use, moisture, or heat exposure. This causes the control board to detect invalid or no signals and trigger F5.

  2. 02

    Damaged or disconnected ribbon cable

    Wiring / connection

    The ribbon cable connecting the touch panel to the control board can become unseated, torn, or corroded, interrupting signal transmission. The control board reads this as a panel failure and displays F5.

  3. 03

    Moisture or grease contamination in the touch panel

    Part replacement

    Steam and grease from cooking can penetrate the touch panel membrane, causing false shorts or stuck keys that the control board interprets as a panel malfunction.

  4. 04

    Faulty control board

    Part replacement

    If the control board itself has a damaged input circuit, it may misinterpret or fail to read signals from an otherwise functional touch panel and display F5. This is less common but should be considered if a new touch panel does not clear the code.

See the test procedure for each cause

Frequently asked questions about F5

What does the F5 error code mean on a Maytag microwave?
F5 on a Maytag microwave means the control board has detected a touch panel failure. The touch panel is the button membrane on the front of the unit, and when the control board cannot receive valid signals from it, the microwave shuts down and displays F5. Replacing the touch panel is the first and most common fix.
How do I fix the F5 error on a Maytag microwave?
Start by unplugging the microwave for two minutes to see if the error clears. If F5 returns, inspect the ribbon cable between the touch panel and control board to make sure it is fully seated and undamaged. If the cable is intact, the touch panel itself needs to be replaced. Order a touch panel specific to your Maytag model number, found on the label inside the door frame.
Can I still use my Maytag microwave with an F5 error code active?
No. When F5 is active, the microwave locks out operation because the control board cannot receive commands from the touch panel. You will not be able to enter cook times or start the unit until the touch panel is repaired or replaced.
How much does it cost to fix F5 on a Maytag microwave?
A replacement touch panel for a Maytag microwave typically costs between $30 and $80 depending on the model. If you replace it yourself, that is the total cost. The repair involves removing the outer casing and swapping the panel, which is manageable for someone comfortable with basic appliance disassembly. If a technician does the repair, expect to add $75 to $150 in labor.
Will resetting my Maytag microwave clear the F5 code?
A reset by unplugging the microwave for two minutes may temporarily clear F5 if the error was caused by a power surge or a momentary signal glitch. However, if the touch panel membrane is physically failed or worn out, the code will return immediately or after a short period of use. A persistent F5 code requires touch panel replacement, not repeated resets.

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