Indoor unit shows E9 and may shut down unexpectedly

Safety first: Turn OFF power before working near the drain system.

• Step 1 – Check for water leakage: Remove the front panel and inspect the drain pan. If full of water, the drain is likely blocked.
• Step 2 – Clear drain line: Locate the condensate drain hose at the back or side of the indoor unit. Use a wet/dry vacuum at the hose outlet outside the building to suck out clogs. Alternatively, gently blow compressed air from the indoor side outward.
• Step 3 – Clean drain pan: Remove debris, algae, or slime from the pan using a cloth and mild detergent. Ensure the drain outlet is clear.
• Step 4 – Check float switch: If your TCL model has a float switch, verify it moves freely and is not stuck in the up (full) position. Replace the float switch if defective.
• Step 5 – Verify slope: Ensure the indoor unit is slightly tilted toward the drain side so water flows out properly.

Warning: Do not use harsh chemicals in the drain line that could damage plastic components.