Remote control does not operate the TCL air conditioner

• Step 1 – Replace batteries: Install fresh, correctly oriented batteries in the remote.
• Step 2 – Check IR transmission: Point the remote at a smartphone camera and press a button; you should see a flashing light on the screen. If not, the remote may be faulty.
• Step 3 – Clear line of sight: Ensure nothing blocks the IR window on the indoor unit.
• Step 4 – Test manual controls: Use the emergency ON/OFF button on the indoor unit (if available). If the unit responds, the IR receiver or remote is at fault.
• Step 5 – Replace remote or receiver: Replace the remote first. If still no response, replace the IR receiver board on the indoor unit.

Warning: Do not open the remote or indoor PCB while connected to power.