Water on the passenger floor is often the A/C
A damp carpet on the passenger side, in summer, with no rain to blame, sends most people looking for a leaking window seal or a bad door. Very often the cause is the air conditioning, and the fix is far simpler than either.
An A/C system pulls moisture out of the cabin air. That water collects on the evaporator, behind the dashboard, and is meant to run out through a small drain tube onto the ground under the vehicle. In a humid Ohio Valley summer the system removes a surprising amount of water, which is why a puddle under a parked vehicle on a hot day is normal.
If the drain tube blocks, with debris, insects or a kinked hose, the water has nowhere to go. It fills the housing behind the dash and eventually overflows into the footwell.
What it leads to if ignored
A wet carpet that stays wet grows mold, and the smell comes through the vents every time the fan runs. Water sitting near the electrical connections behind the dash is not good for them either.
How to tell
- Water appears on the passenger floor in dry weather.
- There is no puddle under the vehicle after a long drive with the A/C on, when there usually is one.
- A sloshing sound behind the dashboard when the vehicle turns or brakes.
- A musty smell from the vents.
Any of those is worth mentioning when you book, because it points straight at the drain rather than at the refrigerant.
What the check covers
Cooling performance, pressures, leaks, the compressor and the condenser, plus the drain when water is part of the complaint. The national A/C service page covers what a recharge does and why repeated recharges mean a leak.
Overheating while the A/C is running is a cooling system question, and an annual check can sit inside scheduled maintenance, both at this store.
About this store
The Henderson store runs sixteen services and is managed by Derrick Madewell.
See the national A/C service page for all 33 locations.