An air conditioner making the sound of running water after installation is usually experiencing the normal movement of refrigerant through the system, SlashGear reported.
This watery noise does not mean a repair is needed. The sound of liquid flowing occurs as the refrigerant moves around inside the equipment.
Homeowners often notice the flowing sound more during winter months when an air conditioner with an indoor coil and an outdoor coil goes through a defrost cycle.
Colder temperatures cause condensation to collect and freeze on the outdoor coil even if the ambient temperature is not below freezing. The defrost cycle switches the refrigerant direction to temporarily heat up the outdoor coil and melt the condensation so the system stays efficient.
A similar flowing sound happens when the system is first switched on because the refrigerant flows more quickly to promptly start cooling the home. Dripping or occasional sloshing sounds are also part of normal operation.
An air conditioner that has been installed for some time and suddenly makes louder sounds warrants investigation. Unusually loud sounds when the system starts or stops can indicate an issue with the compressor or capacitor. Unusually loud humming or clicking sounds while running also indicate a fault in various components.
A sudden hissing sound can indicate a refrigerant leak and should not be ignored. The system should be shut off and a professional called to diagnose the problem.
An unexpected sound on its own does not mean an HVAC system needs replacement. When paired with red flags like a sudden loss of heating and cooling performance or a strange, unpleasant smell, the system may need repairs.
Routine maintenance keeps an air conditioner in good working order and minimizes common problems. That includes cleaning out air filters and servicing the air conditioner regularly to prevent issues.
