A constant drip or continuous flow from your HVAC air conditioning condensate drain pipe is typically caused by normal dehumidification and moisture removal from indoor air by the evaporator coil. During hot summer months, your AC unit pulls massive amounts of humidity out of your home, draining gallons of water daily through this pipe. However, if the drip stops completely or backs up, it indicates a clogged condensate drain line or algae blockage. Verification: Inspect the condensate drain line periodically and flush it with vinegar or bleach to prevent clogs.
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