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Error code reference

Dacor Microwave Error Code LOCK

Displayed when a control panel pad is touched while the Safety Lock feature is active, indicating the control…

Dacor codesDacor microwave codes

Displayed when a control panel pad is touched while the Safety Lock feature is active, indicating the control panel is deactivated.

First step from the service manual

To cancel Safety Lock, touch HELP GUIDE, the number 1, and STOP/CLEAR.

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

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What LOCK means on a Dacor microwave

The LOCK display on a Dacor microwave is not a malfunction or fault code. It is a status indicator that appears when the Safety Lock feature has been activated on the unit. When Safety Lock is engaged, the control panel is fully deactivated, meaning no input from any pad will be processed by the microwave. The display of LOCK is the microwave's way of communicating that any button press is being intentionally ignored by the system.

The Safety Lock feature is a built-in child safety function controlled through the microwave's control board firmware. When active, the control board intercepts and disregards all touchpad signals, preventing unintended operation. This is entirely a software-level lock state and does not involve any hardware failure, sensor malfunction, or component damage. The control panel, membrane touchpad, and control board are all functioning correctly when LOCK appears.

The most common reason LOCK appears is that the Safety Lock was activated either deliberately or accidentally by pressing the enabling key sequence. Because the unlock sequence requires touching HELP GUIDE, then the number 1, then STOP/CLEAR, users unfamiliar with this procedure may be confused when their inputs produce no response other than the LOCK display. No parts replacement or technical repair is needed to resolve this condition.

Source: manufacturer service documentation.

Common causes of LOCK

  1. 01

    Safety Lock Activated Intentionally

    Wiring / connection

    A household member previously enabled the Safety Lock feature to prevent unintended microwave use. This is the most common reason for the LOCK display and requires only the unlock sequence to resolve.

  2. 02

    Accidental Key Sequence Entry

    Wiring / connection

    The Safety Lock activation sequence may have been entered accidentally during normal use. If the lock appeared unexpectedly, an unintentional button combination likely triggered it.

  3. 03

    Child Interaction with Control Panel

    Wiring / connection

    Children pressing buttons on the control panel can inadvertently activate the Safety Lock sequence. This is a common occurrence in households with young children and resolves immediately with the correct unlock steps.

  4. 04

    Unfamiliarity with Lock Status Display

    Wiring / connection

    Users who are not aware of the Safety Lock feature may interpret the LOCK display as an error code. The microwave is operating correctly and the condition clears as soon as the proper sequence is entered.

See the test procedure for each cause

Frequently asked questions about LOCK

What does LOCK mean on a Dacor microwave?
LOCK on a Dacor microwave means the Safety Lock feature is active and the control panel has been deactivated. This is not an error or malfunction. It is a built-in child safety function that prevents any button inputs from being processed. The microwave hardware is fully operational and the condition clears once the correct unlock sequence is entered.
How do I fix the LOCK display on my Dacor microwave?
To cancel Safety Lock, press HELP GUIDE, then the number 1, then STOP/CLEAR in sequence. Once entered correctly, the LOCK display will clear and the control panel will return to normal operation. No tools, parts, or service call are required to resolve this condition.
Is it safe to use my Dacor microwave when LOCK is showing?
The LOCK display means the control panel is intentionally disabled and the microwave cannot be started in this state. The unit itself is not damaged or unsafe. Once the Safety Lock is deactivated using the unlock sequence, the microwave is safe to use normally.
Will unplugging my Dacor microwave clear the LOCK display?
Unplugging and replugging the microwave may or may not clear the Safety Lock, depending on how the control board retains its state after a power cycle. The reliable and recommended method to clear the LOCK display is to enter the proper sequence: HELP GUIDE, then 1, then STOP/CLEAR. Using this sequence ensures the lock is intentionally deactivated rather than relying on a power reset.
How much does it cost to repair a Dacor microwave showing LOCK?
There is no repair cost associated with the LOCK display because it is not a malfunction. It is a software-level safety feature that is cleared by pressing the correct sequence of buttons on the control panel. If the control panel fails to respond to the unlock sequence after multiple attempts, that could indicate a touchpad or control board issue, which a technician would need to diagnose at a typical appliance service call cost ranging from $75 to $150 or more depending on your area.

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