Unit displays lights or indicators but does not respond to any buttons on the unit or remote.

Safety first: No internal electrical work is needed for initial checks.

• Step 1 – Check for child lock: On many Samsung remotes, holding specific buttons (e.g., Temp Up + Temp Down) for several seconds toggles child lock. Refer to your manual and try disabling it.
• Step 2 – Power reset: Turn off the breaker for 5 minutes, then restore power and test again.
• Step 3 – Test remote vs. unit buttons: If the unit buttons work but the remote does not, suspect the remote or IR receiver. If neither works, suspect the PCB.
• Step 4 – Inspect front panel buttons: Ensure no button is physically stuck in the pressed position.
• Technician required: Persistent unresponsiveness after reset may require PCB replacement.