Why is my mini split leaking water improperly?Updated 5 hours ago

There are only a few reasons why a Pioneer wall-mounted indoor unit could be leaking water. The most common reason is the drain tube is cracked, clogged, or not at a continuous downward pitch. The drain tube is an insulated tube on the rear side of the indoor unit. 

Check the state of the drain hose, as well as any attached extensions. Conduct a drainage test to ensure the hose can drain freely. You can conduct a drainage test by opening the front panel, removing any filters, and pouring water over the coils. Check whether the water is properly exiting from the point of drain.

Another set of possible causes:

• The indoor unit is not level. 
• The drain pan is cracked or damaged. 
• The drain outlet port is exposed (most models have drain ports on both sides, where the unused one stays plugged by a stopper). 
• If the drain pain is filled with debris or dust and preventing water from draining, you can pour a 50/50 mixture of water and white vinegar into the drain pan to unblock it. You can also use specialized cleaner tablets.

If your unit passes the drainage test but drips water from time to time, then your issue is not plumbing/drain related but can likely be attributing to either:

• If water drips from the front louver where air blows out: Make sure the air flaps or louvers are not in a closed position, causing the airflow to be cut. This will lead to a buildup of condensation and dripping. Manipulate the air flaps and louvers to ensure the removal of airflow restrictions.
• If water drips as a result of excessive ice/frost forming on the coils: The system is potentially low on refrigerant. This causes a buildup of icing and frost on the coils to the point where you can see ice completely blocking your view of the coil. This ice then melts and leads to water dripping off of the unit, which is ultimately a symptom of a bigger problem at hand. Check the operating pressure of the system and recharge to spec. if needed.

On top of all these possible causes, it is always best practice to ensure that your filters, coil, and blower wheel are clean and clear. Otherwise, it can limit the performance of the equipment and potentially lead to unintended consequences, such as water dripping or leakage.