Hi, thanks for the question. It sounds like the evap. drain tube. There is a tube for excess water from the A/C system on the pass. side under the dash near the middle above where your feet are usually at. The problem you describe is caused by the tube being clogged by debris or pinched by the floormat. OR it's disconnected completely. You need to check the hose to see if it's pinched or clogged. I'm 95% sure that's what is wrong... It would be the first thing I'd check if your car came into my shop.
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Honda Service Technician
Silver level Honda technician, ASE Master Auto Technician, L1 Certification, Ca. Smog Lic.