How to Stop an HVAC Leak

Inspect the HVAC unit to determine the origin of the leak. Remove the unit cabinet with a screwdriver and shine a flashlight into the unit. Check for any moisture or drips without touching unit components.

Turn off the HVAC unit. Inspect the hose protruding from the unit for cracks. Replace with black hose if damaged. Check hose fittings for cracks and replace damaged fittings. Remove any kinks or heavy objects creating a hose blockage.

Inspect the discharge end of the hose to confirm it is not entering the drain or submerged in water. Trim the end of the hose with a hose cutter if it is extending into the drain. Squeeze the drain hose with your fingers to force clogs to move through the hose. Apply pressure down the entire length. Begin at the fitting and continue to the drain.

Grip the discharge end of the hose. Spray a blast of compressed air into the hose. Place the hose immediately on the drain to release any clogs. Insert a soft wire brush into the hose to remove any stubborn clogs.

Check the evaporator coil and suction line wrapped in black insulation. Replace insulation if it is damaged. Look for ice on the coil. Keep the unit off for an hour to give the ice time to completely melt. Clean the excess water and restore power to the unit.