2000 Honda Civic Q&A
2000 Honda Civic Question: WHY IS WATER LEAKING ON MY FLOORBOARD?
There is a line that drains condensation from your HVAC system. It should be under the dash on the passenger side of the car. This could have come loose. It is possible that the heater core or hoses are leaking still. The core is unlikely since new. Maybe 1 of the heater hoses is loose. if you can figure out if it is just water or coolant, you will know better where to look for the leak. - big01_dram