Maytag Microwave LOC Error: Control locked
What Does Maytag Microwave Error Code LOC Mean? LOC on a Maytag microwave — sometimes shown as L or LOCK depending on the model — means the control lock feature is active. Maytag MMV over-the-range and countertop microwaves include a control lock (also called child lock) that disables all keypad inputs to prevent accidental or […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. While the Maytag microwave itself is in a safe standby state, it cannot be used for cooking with LOC active. Unlock the control panel using the steps above before use.
Can I reset the code?
Yes. LOC always clears — either by the hold-to-unlock key sequence or by a power cycle. No replacement parts are needed.
When to stop immediately?
Stop if you notice: LOC returns immediately after the correct unlock sequence is entered, Control panel shows additional fault codes after clearing LOC.
Symptoms You May Notice
All keypad buttons unresponsive
The control panel ignores all button presses because the child lock feature has been activated.
Lock appears to have been set unintentionally
The LOC condition is sometimes triggered accidentally when the control panel is wiped during cleaning, or when a child presses and holds a key long enough to activate the lock sequence.
Microwave appears to have power but will not accept any input
The appliance is on, the display is lit and showing the time, but absolutely no cooking-related button produces any action — the hallmark symptom of an active control lock.
Clock display still visible
The time display continues to show normally — only cooking controls are locked.
Possible Causes
Control lock intentionally activated by a household member
A user activated LOC using the hold-to-lock key sequence on the Maytag microwave — a feature designed to prevent children or unauthorized users from operating the appliance.
DIY PossibleAccidental activation during panel cleaning
Pressing and holding a designated key while wiping the control panel with a cloth activated the lock sequence unintentionally. Very common on Maytag MMV models where the lock key is in the center of the panel.
DIY PossibleControl board glitch retaining lock state after a power event
Rarely, the control board retains the lock flag in non-volatile memory even after the normal unlock sequence is entered, requiring a full power reset to clear. This is a board behavior issue, not a hardware failure.
DIY PossibleSafe Checks You Can Do
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1
Unlock the Maytag microwave control panel
Most Maytag MMV and countertop models unlock by pressing and holding the Cancel pad (or the Lock pad, if present) for three to five seconds until LOC disappears from the display. Refer to the use-and-care manual for your specific model if the standard sequence does not work.
On some Maytag MMV models the lock key is labeled with a padlock symbol. On countertop models it may be a secondary function of the Stop/Cancel key activated by a long press. The exact pad varies by model year.
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2
Power cycle if the standard unlock does not clear LOC
If the hold-to-unlock sequence does not clear LOC, unplug the countertop Maytag microwave for 30 seconds (or switch off the MMV breaker), then restore power. LOC should not persist after a full power cycle because the lock state is normally stored in volatile memory.
After clearing LOC via power cycle, reset the clock and test the keypad to confirm all pads are responsive before using the microwave.
When to Call a Professional
Contact a qualified technician if:
- LOC persists after both the unlock sequence and a full power reset — possible non-volatile memory fault on the control board
- Additional fault codes appear on the same power cycle as LOC, indicating a broader control board issue
- Panel cleaning reveals damaged keypad that may be causing spurious lock activation
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