Navien water heater is leaking condensate (clear water) from the bottom or from vent connections.

Safety: Turn OFF power before working on condensate components. Condensate is mildly acidic; wear gloves and eye protection.

Steps:

• 1. Inspect condensate trap and hoses: Remove the front cover and trace the condensate path from the heat exchanger to the drain. Look for cracks, loose clamps, or disconnected hoses.
• 2. Clear blockages: Remove the condensate trap and flush it with clean water to remove sludge. Ensure the drain line is not kinked or blocked.
• 3. Verify vent slope: Check that horizontal vent runs slope back toward the unit only if designed for internal drainage, or toward an external drain as per Navien instructions. Incorrect slope can cause leaks at joints.
• 4. Reassemble and test: Reconnect hoses securely, refill the trap with water, restore power, and run the unit while checking for leaks.

If leaks persist from the heat exchanger area or vent joints, a technician should inspect for cracks or installation errors.