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Error code reference

Maytag Oven Error Code 1c7c

Control not calibrated; calibration value out of range

Maytag codesMaytag oven codes

Control not calibrated; calibration value out of range. Displays 'CAL' in time digits.

First step from the service manual

Recalibrate or replace control; control disables lights and timers.

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

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What 1c7c means on a Maytag oven

Error code 1C7C indicates the control board has detected a calibration value that falls outside its acceptable operating range. During normal operation, Maytag ovens store calibration data within the control board to ensure accurate temperature output. When the stored value is corrupt, missing, or outside the valid range, the board either displays 'CAL' in the time digit positions (labeled H1 or H2 depending on the model) or disables all outputs entirely, a state referred to as UH. The first corrective action is replacement of the control board, as the fault originates within that component.

For homeowners, this means the electronics that control your oven's temperature and functions have lost or stored incorrect calibration data. Calibration tells the oven how to match its actual heat output to the temperatures you set. When this data is corrupted or out of range, the oven cannot trust its own settings, so it either locks up or signals a fault instead of operating normally. You may see 'CAL' where the clock digits normally appear, or the oven may simply stop responding to any inputs. This is not a sensor issue or a heating element failure. The problem lives inside the control board itself, and replacing it is the primary fix.

Source: manufacturer service documentation.

Common causes of 1c7c

  1. 01

    Corrupted calibration data in the control board

    Part replacement

    The control board stores a calibration offset value in non-volatile memory. If this stored value becomes corrupted due to a power surge, voltage spike, or internal memory failure, the board reads it as out of range and triggers 1C7C.

  2. 02

    Failed or defective control board

    Part replacement

    A control board that has experienced component-level failure may be unable to read or write calibration values correctly, causing the stored calibration data to fall outside the valid range and locking out all outputs.

  3. 03

    Power surge or brownout event

    Wiring / connection

    A sudden loss of power or voltage fluctuation during operation can corrupt the calibration value stored in the board's memory, triggering this fault code on the next power-up without any physical damage to the board itself.

  4. 04

    Improper manual calibration adjustment

    Wiring / connection

    If a previous calibration adjustment was entered incorrectly through the user interface, the stored offset may exceed the board's allowable range, triggering 1C7C. This can occur if a user or technician entered a calibration value beyond the permitted limit.

See the test procedure for each cause

Frequently asked questions about 1c7c

What does error code 1C7C mean on a Maytag oven?
Error code 1C7C means the control board has detected a calibration value that is outside its acceptable range. The board either displays 'CAL' in the time digits or disables all oven outputs as a safety response. The calibration data is stored inside the control board, so the fix targets that component directly rather than sensors or heating elements.
How do I fix error code 1C7C on a Maytag oven?
The primary fix for 1C7C is replacing the control board. Before ordering a part, try a hard reset by disconnecting power to the oven for 5 minutes. If the code returns after restoring power, the calibration data is not recoverable through a reset and the control board needs to be replaced. Match the replacement board to your exact model number, as calibration parameters vary by model.
Can I still use my Maytag oven when error code 1C7C is active?
In most cases, no. When 1C7C is active, the control board either shows 'CAL' in the time display or disables all outputs entirely, meaning the oven will not heat or respond to controls. Even if limited function appears available, operating the oven with an uncalibrated control board means temperature accuracy cannot be trusted, which creates both cooking and safety concerns. Resolve the fault before using the oven.
How much does it cost to fix a Maytag oven with error code 1C7C?
A replacement Maytag oven control board typically costs between $150 and $350 depending on the model. If you hire a technician, expect an additional $100 to $200 in labor, bringing the total repair to roughly $250 to $550. Replacing a control board is a manageable DIY task for someone comfortable working with appliance electronics. The board connects via wiring harness plugs, and the work does not require special tools beyond basic hand tools and precautions for working with capacitors.
Will resetting my Maytag oven clear the 1C7C error code?
A power reset may clear 1C7C temporarily if the calibration data was corrupted by a one-time power event. Disconnect the oven from power for at least 5 minutes, then restore power and check if the code returns. If 1C7C comes back after the reset, the control board's stored calibration value is either permanently corrupted or the board itself has failed, and replacement is required.

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