mypros+
Error code reference

Maytag Cooktop Error Code LOCKED LED

Checksum failure on control board; LOCKED LED illuminated when power applied with no dual, triple or bridge…

Maytag codesMaytag cooktop codes

Checksum failure on control board; LOCKED LED illuminated when power applied with no dual, triple or bridge elements selected.

First step from the service manual

Replace control board.

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

MyPros+ Max

Get the full diagnostic procedure for LOCKED LED.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What LOCKED LED means on a Maytag cooktop

The LOCKED LED error on a Maytag cooktop indicates a checksum failure within the control board. A checksum is a calculated value the control board uses to verify the integrity of its stored firmware or configuration data. When the values stored in memory do not match the expected checksum, the board recognizes a data corruption event and flags the failure. The symptom is specific: the LOCKED LED illuminates immediately when power is applied, even though no dual, triple, or bridge elements have been selected by the user.

This behavior distinguishes a checksum failure from a user-initiated lock condition. Normally, the LOCKED LED activates only when the control lock feature is engaged intentionally. When it lights up at power-on with no element configuration active, the control board itself is the source of the fault. The internal memory, whether EEPROM or flash, has lost or corrupted the data the processor relies on to initialize correctly. This can result from a power surge, a brief but significant voltage irregularity, or simply component degradation over time.

Because the failure originates inside the control board at the firmware or memory level, there is no external sensor, wiring harness, or burner component to test or adjust. The diagnostic path leads directly to the control board as the defective component. No reset procedure or power cycle will restore corrupted memory data, making control board replacement the necessary and only effective repair.

Source: manufacturer service documentation.

Common causes of LOCKED LED

  1. 01

    Control board memory corruption

    Part replacement

    The most direct cause of this error is corrupted firmware or configuration data stored on the control board. This is an internal board failure that cannot be repaired through resets or external adjustments.

  2. 02

    Power surge or voltage spike

    Part replacement

    A sudden surge in household voltage can damage or corrupt the memory components on the control board. If the error appeared after a power outage or electrical storm, a surge-related board failure is likely.

  3. 03

    Gradual EEPROM or memory component degradation

    Part replacement

    Over time, the memory chips on a control board can degrade and fail to retain valid data. This type of failure tends to appear without any obvious triggering event.

  4. 04

    Intermittent power interruption during board initialization

    Part replacement

    A brief loss of power while the control board was writing or verifying data can leave the memory in a corrupted state. The LOCKED LED will then illuminate on every subsequent power-on.

See the test procedure for each cause

Frequently asked questions about LOCKED LED

What does LOCKED LED mean on a Maytag cooktop?
On a Maytag cooktop, the LOCKED LED illuminating at power-on with no elements selected indicates a checksum failure on the control board. This means the board's internal memory data is corrupted or invalid. It is not a user-activated lock condition. The control board must be replaced to resolve the issue.
Can I fix the LOCKED LED error myself on a Maytag cooktop?
The only repair for this error is replacing the control board. There are no wiring connections, sensors, or burner components to test since the failure is internal to the board itself. A confident DIYer comfortable with appliance disassembly can complete this repair, but if you are unsure, a qualified technician is recommended.
Is it safe to use my Maytag cooktop when the LOCKED LED error is showing?
When the LOCKED LED error is active due to a checksum failure, the control board has not initialized correctly. You should not attempt to use the cooktop until the board is replaced, as the controls may not respond predictably or at all.
Will resetting or unplugging the cooktop clear the LOCKED LED error?
No. Because this error results from corrupted data stored inside the control board's memory, cycling power or performing a reset will not restore valid data. The LOCKED LED will return every time power is applied until the control board is replaced.
How much does it cost to fix the LOCKED LED error on a Maytag cooktop?
Repair costs depend on the specific control board required and whether you hire a technician. Control board parts for cooktops generally range from $100 to $300 or more depending on the model. If you use a professional repair service, expect to add labor costs on top of the part price, typically bringing the total into the $200 to $500 range.

Related Maytag cooktop codes

All Maytag cooktop codes
View all 13 Maytag cooktop codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass