Split air conditioners produce condensation as part of the cooling process. When liquid refrigerant absorbs heat from the indoor air, it turns from liquid to vapour. As the refrigerant evaporates inside the coils, it causes the moisture in the air to condense. The resultant condensation drips off the coils and into a drainage system. Therefore, there shouldn't be any moisture damage in your home. If water leaks from the AC to the surface below, there is a problem. Below are four potential causes of AC leaks and tips on how to resolve them.
Damaged condensate drain pan
Condensation from the coils drips onto a drain pan, where it is pumped into the drainage system through the condensate line. If you have an old air conditioner, check the drain pan for rust. Rust compromises the structural integrity of the drain pan, causing it to crack. Consequently, when water drips onto the pan, it leaks onto the surface below and stains it. Failure to address the leak can lead to mold growth around your indoor unit. Luckily, a drain pan can be repaired or replaced depending on the severity of the damage and the type of multi-split air system.
Faulty condensate pump
A condensate pump is a centrifugal pump that collects condensate and pumps it out into your drainage system. The pump can fail for the following reasons:
- Dirt and debris build up in the pump's float components
- Age-related wear and tear
- Faulty pump valve
The condensate pump can also stop working because of a tripped circuit breaker. If the pump isn't working, the water collected in the drain pan won't flow into the drainage system. The drain pan will fill up and overflow, leading to leaks. Repair or replace the pump to ensure proper condensate drainage.
Clogged condensate line
The condensate line carries water from the drain pan to the outdoor drainage system. Blockage in the condensate line hinders this process, causing water to overflow in the drain pan. If you notice any musty or moldy odours coming from your air conditioner, you should check your condensate system for blockage. Unclog the line to allow water flow. You also need to clean the drainage system to eliminate the unpleasant odours.
Low refrigerant in the unit
Low refrigerant alters the pressure in the system, causing the coils to freeze over. If warm air blows over the coils, the ice will melt, and the moisture will drip onto the surfaces. Low refrigerant also results in inadequate cooling and short cycling. If you suspect this problem, shut off the AC to avoid damaging its components.
Air conditioner leaks usually result from low refrigerant or a faulty drainage system. For an accurate diagnosis and repair, consult an air conditioning repair contractor.
