Unit displays H8 and stops cooling; may indicate full internal water tank on portable models.

Safety: Turn the unit off and unplug it before draining water to avoid electrical shock.

Steps:

• Drain the tank: On NewAir portable air conditioners, locate the lower drain plug or hose connection at the rear or bottom. Place a shallow pan or tray under the drain and remove the plug to let water flow out.
• Check float switch: After draining, remove the rear panel to access the internal condensate tank and float switch. Ensure the float moves freely up and down and is not stuck by debris or scale.
• Clean the tank: Wipe out any slime, mold, or debris from the tank that could interfere with the float.
• Inspect wiring: Verify that the float switch wiring harness is intact and firmly connected to the main control PCB.
• Replace switch if needed: If H8 remains even when the tank is empty and the float is down, replace the water level float switch or sensor assembly.