There could be several reasons why your air conditioner is not draining water. Here are a few possible explanations:
Clogged condensate drain line: The most common cause of water not draining from an air conditioner is a clogged condensate drain line. Over time, dirt, dust, and algae can accumulate in the drain line, obstructing the flow of water. This blockage can cause water to back up and potentially leak from the unit. Cleaning the drain line with a mixture of bleach and water or using a pipe cleaner can often resolve this issue.
Incorrect installation: If your air conditioner was not installed correctly, it could lead to drainage problems. The unit should be installed with a slight downward slope towards the condensate drain line to ensure proper water flow. If the slope is incorrect, water may accumulate in the unit and not drain properly.
Faulty condensate pump: Some air conditioning systems use a condensate pump to remove water from the unit. If the pump is malfunctioning or not working at all, it can cause water to back up and not drain properly. Check if the condensate pump is running, and if not, it may need repair or replacement.
Frozen evaporator coil: If the evaporator coil inside your air conditioner becomes frozen, it can prevent water from properly draining. This can happen due to restricted airflow, low refrigerant levels, or a malfunctioning blower motor. If you suspect a frozen coil, it's best to turn off the unit and allow it to thaw completely before troubleshooting further.
Improper sizing: If your air conditioner is oversized for the space it is cooling, it may not run long enough to remove humidity adequately. As a result, the excess moisture may not be drained properly, leading to water accumulation. This issue is more common in improperly sized or mismatched systems.
If you're unsure about how to resolve the problem, it's recommended to contact a professional HVAC technician. They have the expertise and knowledge to diagnose the issue accurately and provide the necessary repairs or maintenance to ensure your air conditioner functions correctly.