Arrived onsite for leak from the furnace. Performed diagnostic and found a leak from the combustion drainage line. Cut out the leaking hose and fittings. Replaced with new tubing and proper fittings. Added extra hose clamps to ensure a strong connection. Tested drainage system and did not find anymore leaks. Observed furnace running and observed dust and a “dancing flame” performed a combustion test to ensure there are not dangerous levels of CO. Did not measure high CO at this time. Note that that it is recommended that this system have a maintenance performed for heating and cooling. Also needs a new filter 16x25x1; as the current one was wet.