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Error code reference

Maytag Oven Error Code 1c4c

Micro-communication failure

Maytag codesMaytag oven codes

Micro-communication failure — serial communication checksum incorrect.

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What 1c4c means on a Maytag oven

Error code 1c4c on a Maytag oven signals a Power Micro communication failure specific to the UH control board. The UH control board integrates the power management and user interface functions into a single unit. When the board loses internal communication between its power micro processor and the rest of the control system, it flags this code. The failure is internal to the board itself, which is why the first and primary corrective action is replacement of the control board.

For homeowners, think of the UH control board as the brain of your oven. It manages everything from temperature regulation to the control panel display. When the 1c4c code appears, it means the internal processors inside that board have lost the ability to communicate with each other. The oven cannot operate reliably in this condition because the power management side of the board is essentially disconnected from the rest of the control logic.

This code is not typically caused by external wiring problems or sensor faults. The failure originates inside the UH control board, making component-level repair impractical. A direct board replacement is the standard resolution. Before replacing the board, a technician may verify power supply voltage and inspect the wiring harness connected to the board to rule out any contributing external factors.

Source: manufacturer service documentation.

Common causes of 1c4c

  1. 01

    Failed UH control board (internal power micro fault)

    Part replacement

    The power micro processor inside the UH control board has failed or lost communication with the board's internal control system. This is the primary cause of the 1c4c code and requires replacing the entire control board.

  2. 02

    Corrupted control board firmware or software glitch

    Wiring / connection

    A temporary software fault or power surge can cause the power micro communication to drop without permanent hardware damage. A hard reset by disconnecting power for several minutes may clear the code, though a recurring 1c4c indicates a true hardware failure.

  3. 03

    Unstable or low supply voltage to the control board

    Wiring / connection

    Insufficient or fluctuating voltage reaching the UH control board can disrupt internal processor communication and trigger this code. Checking the power supply and wiring harness connections to the board should be done before ordering a replacement.

  4. 04

    Damaged wiring harness connector to the UH control board

    Part replacement

    A loose, corroded, or burnt connector on the harness feeding the UH control board can cause intermittent power delivery, which may generate false 1c4c faults. Inspecting and reseating or replacing the connector can resolve these cases.

See the test procedure for each cause

Frequently asked questions about 1c4c

What does error code 1c4c mean on a Maytag oven?
The 1c4c code indicates a Power Micro communication failure in the UH control board. The UH control board is a combined unit that handles both power management and user interface functions. When its internal processors lose communication with each other, the oven generates this code. The problem originates inside the board itself, not in external sensors or wiring.
How do I fix error code 1c4c on my Maytag oven?
Start by disconnecting power to the oven for five minutes to allow a hard reset. Restore power and check if the code returns. If 1c4c comes back, inspect the wiring harness connectors to the control board for looseness, corrosion, or burn marks, and check that the oven is receiving correct supply voltage. If none of those resolve it, the UH control board requires replacement. This is the standard fix Maytag specifies for this code.
Is it safe to use my Maytag oven while error code 1c4c is active?
Using the oven with an active 1c4c code is not advisable. The failure involves the power management processor inside the UH control board, which means the oven cannot reliably regulate power or respond to controls. Operating it in this state risks unpredictable behavior including failure to maintain correct temperature or improper shutdown. Discontinue use until the control board is replaced.
How much does it cost to fix error code 1c4c on a Maytag oven?
A replacement Maytag UH control board typically costs between $150 and $350 depending on the specific model. If you hire a technician, expect to add $100 to $200 in labor, bringing total repair costs to roughly $250 to $550. The board swap itself is a moderately involved repair requiring removal of the back panel or control console depending on the model. Experienced DIYers with basic appliance repair skills can complete it, but if you are not comfortable working around oven wiring, having a technician handle it is a reasonable choice.
Can a power reset clear the 1c4c error code on a Maytag oven?
A power reset can clear the 1c4c code if the fault was caused by a temporary software glitch or a brief power fluctuation. Disconnect the oven from power for at least five minutes, then restore power and see if the code returns. If 1c4c reappears after the reset, the UH control board has a hardware failure and a reset will not provide a lasting fix. Repeated resets on a board with an internal processor fault will not prevent the code from returning.

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