GE portable air conditioner displays P1 and stops cooling, often with water in the base

Safety: Turn the unit off and unplug it. Water may spill when moving the unit.

Steps:

• Drain the tank: Move the portable AC to a location where water can be drained safely. Remove the lower drain cap/plug at the back or bottom and allow water to drain into a shallow pan or floor drain.
• Clear blockage: Check the drain port for debris or sludge. Use a small brush or pipe cleaner to clear it.
• Check drain hose (if used): Ensure any attached drain hose is not kinked, elevated too high, or blocked. Flush with water if needed.
• Level the unit: Confirm the AC is on a level surface so water flows correctly to the tank or drain.
• Float switch inspection: Remove the rear panel (if accessible) and locate the float or water level sensor. Ensure it moves freely and is not stuck by dirt or scale. Clean gently.
• Replace sensor: If P1 persists even when empty and the float is free, replace the water level sensor or float switch assembly.