Diagnosis
The large 'C' on your Samsung Bespoke DW80B7070AP display indicates that the Control Lock (often called Child Lock) feature is active. This is a safety function that disables all buttons on the control panel to prevent accidental cycle changes or starts, especially useful in households with children.
How to Fix It
To deactivate the Control Lock, you need to press and hold two specific buttons simultaneously. Locate the Heated Dry and High Temp Wash buttons on your control panel. Press and hold both of them down for approximately 3 seconds. You will see the 'C' icon disappear from the display, confirming the lock is off. Your dishwasher's control panel is now fully responsive and ready for normal operation.
If That Didn't Work
If the button combination fails to clear the 'C', a soft reset of the dishwasher's electronic control board is the next step. First, ensure the dishwasher is not running. Then, unplug the appliance from its dedicated wall outlet and wait for a full 5 minutes. This allows any residual power to drain and the control system to fully reset. After 5 minutes, plug the unit back in. The display should initialize normally without the 'C'. If it persists, check for any stuck or physically damaged buttons that might be continuously sending a lock signal.
Heads Up
A Control Lock that repeatedly re-engages by itself, especially after cleaning, can be a sign of moisture ingress or a sticky residue (like from cleaning sprays) on the touch-sensitive control panel. Always wipe the panel with a soft, dry cloth and avoid using liquid cleaners directly on it. If the issue continues, it may indicate a fault in the touchpad assembly requiring service.