Hi there- My car has been leaking (so much that the floorboard is squashy) in the accord. It is wet behind the center dash to the right of the gas/accelerator panel near the firewall. There's a foam sponge in there that is soaked. It is seeping through there to the low foot points in the floor. A minimal amount of leakage on the passengers side. Door areas are clear and have been sealed (fixed those a while back). Sunroof drains all clear. I am suspecting ac condensation leak- and it is not draining very much below the car- 1 drip every 20-30 seconds in high heat and humidity Florida. What do you think? Please help!

 

If condensate drain is blocked, it may leak into the cabin. If you hear water sloshing during turns, then blocked drain is likely.

Evap drain is on pax side firewall in engine compartment. Watch when AC is running for draining of water. If none, then blockage is likely problem.

Some have had luck w/ using soft "pipe cleaner" wire to clean out drain tube. Nothing to aggressive or you may poke a hole in evap (bad!!). Also blowing w/ air may move the blockage, but blockage may return. Worst case evaporator assy must be removed to open/clean ($$$).

good lujck

 

And if TexasHonda's suggestions don't help, consider a leak in the seal around the windshield allowing warm/humid air inside that condenses behind the dash in the cooler cabin when A/C is on.