LG Dishwasher CR Error Code — What It Means
The CR code on an LG dishwasher stands for Continuous Run or test mode. This is not a fault code that indicates a broken component. Instead, it means the dishwasher has entered a diagnostic mode that installers and service technicians use during setup or maintenance checks. LG’s official support confirms that CR indicates the unit is in TEST MODE and instructs users to press the POWER button to switch the dishwasher off and exit the mode.
Most of the time, the dishwasher enters this mode accidentally through an unintended button sequence during normal use or cleaning. If the code keeps returning after you reset the unit, the underlying issue is usually a stuck button, a control panel that is misreading inputs, or a wiring problem between the user interface and the main control board. It is not related to water supply, drainage, or heating faults.
Common Causes
- Accidental button sequence during use The dishwasher was unintentionally put into service or test mode by pressing a specific combination of buttons.
- Stuck or damaged button on the control panel A key is physically stuck or the button membrane is continuously actuated, causing the unit to think the test mode sequence is active.
- Control panel misreading inputs at power-up The user interface is registering a button press or sequence when none is occurring, triggering the mode automatically.
- Loose or damaged wiring harness connection The connector between the control panel and the main board is loose, corroded, or damaged, creating intermittent input signals.
- Main control board input fault The control board itself is interpreting normal signals as a test mode request due to an internal failure.
Step-by-Step Fix
- Press the POWER button to turn the dishwasher off and attempt to exit test mode as recommended by LG support.
- Unplug the dishwasher or switch off the circuit breaker, wait 30 seconds, then restore power to perform a full reset of the control system.
- Inspect the control panel for any buttons that appear stuck, dirty, or damaged, and clean around the keypad area with a dry cloth.
- Check the wiring harness between the user interface and the main control board for loose connectors, visible damage, or corrosion, and reseat all connections firmly.
- Start a normal wash cycle to confirm the dishwasher operates without re-entering CR mode.
- Monitor for recurrence over the next few cycles to determine if the issue was a one-time event or a persistent fault.
- Replace the control panel or main board if the CR code returns repeatedly and no stuck buttons or wiring issues are found.
Parts Often Needed
| Part | Notes |
|---|---|
| Control panel / user interface assembly | Amazon | Needed if buttons are sticking or the panel continuously triggers test mode. |
| Main control board (PCB) | Amazon | Required if the dishwasher cannot exit CR mode reliably or re-enters it after reset with no panel fault. |
| Wiring harness / connector set | Amazon | Use if connections between the user interface and control board are loose, damaged, or corroded. |
When to Call a Pro
Call a technician if the CR code returns after a power reset and you have confirmed no buttons are stuck. A pro can test the control panel and main board with diagnostic tools to isolate whether the fault is in the user interface, the wiring, or the board itself. Also call for help if you are uncomfortable working with electrical connections or accessing internal components behind the door panel.